diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index cd1fbcc379b..b5d1cf5bcc6 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -18461,7 +18461,7 @@ namespace ts {
         function checkTypeReferenceNode(node: TypeReferenceNode | ExpressionWithTypeArguments) {
             checkGrammarTypeArguments(node, node.typeArguments);
             if (node.kind === SyntaxKind.TypeReference && node.typeName.jsdocDot && !isInJavaScriptFile(node) && !findAncestor(node, n => n.kind === SyntaxKind.JSDocTypeExpression)) {
-                grammarErrorOnNode(node, Diagnostics.JSDoc_types_can_only_used_inside_documentation_comments);
+                grammarErrorOnNode(node, Diagnostics.JSDoc_types_can_only_be_used_inside_documentation_comments);
             }
             const type = getTypeFromTypeReference(node);
             if (type !== unknownType) {
@@ -22060,7 +22060,7 @@ namespace ts {
                 case SyntaxKind.JSDocAllType:
                 case SyntaxKind.JSDocUnknownType:
                     if (!isInJavaScriptFile(node) && !findAncestor(node, n => n.kind === SyntaxKind.JSDocTypeExpression)) {
-                        grammarErrorOnNode(node, Diagnostics.JSDoc_types_can_only_used_inside_documentation_comments);
+                        grammarErrorOnNode(node, Diagnostics.JSDoc_types_can_only_be_used_inside_documentation_comments);
                     }
                     return;
                 case SyntaxKind.JSDocTypeExpression:
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index cee632634a9..9881d32d775 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -3475,7 +3475,7 @@
         "category": "Message",
         "code": 8019
     },
-    "JSDoc types can only used inside documentation comments.": {
+    "JSDoc types can only be used inside documentation comments.": {
         "category": "Error",
         "code": 8020
     },
diff --git a/tests/baselines/reference/jsdocInTypescript.errors.txt b/tests/baselines/reference/jsdocInTypescript.errors.txt
index 3e5e0ca027f..d1d6f404e15 100644
--- a/tests/baselines/reference/jsdocInTypescript.errors.txt
+++ b/tests/baselines/reference/jsdocInTypescript.errors.txt
@@ -1,85 +1,85 @@
-tests/cases/conformance/jsdoc/jsdocInTypescript.ts(2,10): error TS8020: JSDoc types can only used inside documentation comments.
-tests/cases/conformance/jsdoc/jsdocInTypescript.ts(4,15): error TS8020: JSDoc types can only used inside documentation comments.
-tests/cases/conformance/jsdoc/jsdocInTypescript.ts(4,27): error TS8020: JSDoc types can only used inside documentation comments.
-tests/cases/conformance/jsdoc/jsdocInTypescript.ts(7,20): error TS8020: JSDoc types can only used inside documentation comments.
-tests/cases/conformance/jsdoc/jsdocInTypescript.ts(7,32): error TS8020: JSDoc types can only used inside documentation comments.
-tests/cases/conformance/jsdoc/jsdocInTypescript.ts(10,18): error TS8020: JSDoc types can only used inside documentation comments.
-tests/cases/conformance/jsdoc/jsdocInTypescript.ts(10,31): error TS8020: JSDoc types can only used inside documentation comments.
+tests/cases/conformance/jsdoc/jsdocInTypescript.ts(2,10): error TS8020: JSDoc types can only be used inside documentation comments.
+tests/cases/conformance/jsdoc/jsdocInTypescript.ts(4,15): error TS8020: JSDoc types can only be used inside documentation comments.
+tests/cases/conformance/jsdoc/jsdocInTypescript.ts(4,27): error TS8020: JSDoc types can only be used inside documentation comments.
+tests/cases/conformance/jsdoc/jsdocInTypescript.ts(7,20): error TS8020: JSDoc types can only be used inside documentation comments.
+tests/cases/conformance/jsdoc/jsdocInTypescript.ts(7,32): error TS8020: JSDoc types can only be used inside documentation comments.
+tests/cases/conformance/jsdoc/jsdocInTypescript.ts(10,18): error TS8020: JSDoc types can only be used inside documentation comments.
+tests/cases/conformance/jsdoc/jsdocInTypescript.ts(10,31): error TS8020: JSDoc types can only be used inside documentation comments.
 tests/cases/conformance/jsdoc/jsdocInTypescript.ts(11,12): error TS2554: Expected 1 arguments, but got 2.
-tests/cases/conformance/jsdoc/jsdocInTypescript.ts(13,14): error TS8020: JSDoc types can only used inside documentation comments.
-tests/cases/conformance/jsdoc/jsdocInTypescript.ts(14,11): error TS8020: JSDoc types can only used inside documentation comments.
-tests/cases/conformance/jsdoc/jsdocInTypescript.ts(15,8): error TS8020: JSDoc types can only used inside documentation comments.
-tests/cases/conformance/jsdoc/jsdocInTypescript.ts(16,15): error TS8020: JSDoc types can only used inside documentation comments.
-tests/cases/conformance/jsdoc/jsdocInTypescript.ts(17,11): error TS8020: JSDoc types can only used inside documentation comments.
+tests/cases/conformance/jsdoc/jsdocInTypescript.ts(13,14): error TS8020: JSDoc types can only be used inside documentation comments.
+tests/cases/conformance/jsdoc/jsdocInTypescript.ts(14,11): error TS8020: JSDoc types can only be used inside documentation comments.
+tests/cases/conformance/jsdoc/jsdocInTypescript.ts(15,8): error TS8020: JSDoc types can only be used inside documentation comments.
+tests/cases/conformance/jsdoc/jsdocInTypescript.ts(16,15): error TS8020: JSDoc types can only be used inside documentation comments.
+tests/cases/conformance/jsdoc/jsdocInTypescript.ts(17,11): error TS8020: JSDoc types can only be used inside documentation comments.
 tests/cases/conformance/jsdoc/jsdocInTypescript.ts(18,5): error TS2322: Type '{}' is not assignable to type 'string'.
-tests/cases/conformance/jsdoc/jsdocInTypescript.ts(18,16): error TS8020: JSDoc types can only used inside documentation comments.
+tests/cases/conformance/jsdoc/jsdocInTypescript.ts(18,16): error TS8020: JSDoc types can only be used inside documentation comments.
 tests/cases/conformance/jsdoc/jsdocInTypescript.ts(19,5): error TS2322: Type '{}' is not assignable to type 'string'.
-tests/cases/conformance/jsdoc/jsdocInTypescript.ts(19,17): error TS8020: JSDoc types can only used inside documentation comments.
-tests/cases/conformance/jsdoc/jsdocInTypescript.ts(20,17): error TS8020: JSDoc types can only used inside documentation comments.
+tests/cases/conformance/jsdoc/jsdocInTypescript.ts(19,17): error TS8020: JSDoc types can only be used inside documentation comments.
+tests/cases/conformance/jsdoc/jsdocInTypescript.ts(20,17): error TS8020: JSDoc types can only be used inside documentation comments.
 tests/cases/conformance/jsdoc/jsdocInTypescript.ts(21,5): error TS2322: Type 'undefined' is not assignable to type 'number | null'.
-tests/cases/conformance/jsdoc/jsdocInTypescript.ts(21,17): error TS8020: JSDoc types can only used inside documentation comments.
+tests/cases/conformance/jsdoc/jsdocInTypescript.ts(21,17): error TS8020: JSDoc types can only be used inside documentation comments.
 
 
 ==== tests/cases/conformance/jsdoc/jsdocInTypescript.ts (20 errors) ====
     // grammar error from checker
     var ara: Array.<number> = [1,2,3];
              ~~~~~~~~~~~~~~
-!!! error TS8020: JSDoc types can only used inside documentation comments.
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
     
     function f(x: ?number, y: Array.<number>) {
                   ~~~~~~~
-!!! error TS8020: JSDoc types can only used inside documentation comments.
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
                               ~~~~~~~~~~~~~~
-!!! error TS8020: JSDoc types can only used inside documentation comments.
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
         return x ? x + y[1] : y[0];
     }
     function hof(ctor: function(new: number, string)) {
                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS8020: JSDoc types can only used inside documentation comments.
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
                                    ~~~~~~~~
-!!! error TS8020: JSDoc types can only used inside documentation comments.
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
         return new ctor('hi');
     }
     function hof2(f: function(this: number, string): string) {
                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS8020: JSDoc types can only used inside documentation comments.
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
                                   ~~~~~~~~
-!!! error TS8020: JSDoc types can only used inside documentation comments.
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
         return f(12, 'hullo');
                ~~~~~~~~~~~~~~
 !!! error TS2554: Expected 1 arguments, but got 2.
     }
     var whatevs: * = 1001;
                  ~
-!!! error TS8020: JSDoc types can only used inside documentation comments.
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
     var ques: ? = 'what';
               ~
-!!! error TS8020: JSDoc types can only used inside documentation comments.
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
     var g: function(number, number): number = (n,m) => n + m;
            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS8020: JSDoc types can only used inside documentation comments.
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
     var variadic: ...boolean = [true, false, true];
                   ~~~~~~~~~~
-!!! error TS8020: JSDoc types can only used inside documentation comments.
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
     var most: !string = 'definite';
               ~~~~~~~
-!!! error TS8020: JSDoc types can only used inside documentation comments.
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
     var weird1: new:string = {};
         ~~~~~~
 !!! error TS2322: Type '{}' is not assignable to type 'string'.
                    ~~~~~~~
-!!! error TS8020: JSDoc types can only used inside documentation comments.
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
     var weird2: this:string = {};
         ~~~~~~
 !!! error TS2322: Type '{}' is not assignable to type 'string'.
                     ~~~~~~~
-!!! error TS8020: JSDoc types can only used inside documentation comments.
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
     var postfixdef: number! = 101;
                     ~~~~~~~
-!!! error TS8020: JSDoc types can only used inside documentation comments.
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
     var postfixopt: number? = undefined;
         ~~~~~~~~~~
 !!! error TS2322: Type 'undefined' is not assignable to type 'number | null'.
                     ~~~~~~~
-!!! error TS8020: JSDoc types can only used inside documentation comments.
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
     
\ No newline at end of file