diff --git a/src/services/refactors/convertToNamedParameters.ts b/src/services/refactors/convertToNamedParameters.ts
index 41c9935deb6..bf11c5df8b7 100644
--- a/src/services/refactors/convertToNamedParameters.ts
+++ b/src/services/refactors/convertToNamedParameters.ts
@@ -142,7 +142,7 @@ namespace ts.refactor.convertToNamedParameters {
         }
 
         function isValidParameterDeclaration(paramDeclaration: ParameterDeclaration): paramDeclaration is ValidParameterDeclaration {
-            return !paramDeclaration.modifiers && isIdentifier(paramDeclaration.name);
+            return !paramDeclaration.modifiers && !paramDeclaration.decorators && isIdentifier(paramDeclaration.name);
         }
     }
 
@@ -361,5 +361,6 @@ namespace ts.refactor.convertToNamedParameters {
     interface ValidParameterDeclaration extends ParameterDeclaration {
         name: Identifier;
         modifiers: undefined;
+        decorators: undefined;
     }
 }
\ No newline at end of file
diff --git a/tests/cases/fourslash/refactorConvertToNamedParameters30.ts b/tests/cases/fourslash/refactorConvertToNamedParameters30.ts
new file mode 100644
index 00000000000..180798af95d
--- /dev/null
+++ b/tests/cases/fourslash/refactorConvertToNamedParameters30.ts
@@ -0,0 +1,11 @@
+/// <reference path='fourslash.ts' />
+
+////declare function required(target: Object, propertyKey: string | symbol, parameterIndex: number)
+////class C {
+////    /*a*/bar/*b*/(@required a: number, b: number) {
+////
+////    }
+////}
+
+goTo.select("a", "b");
+verify.not.refactorAvailable("Convert to named parameters");
\ No newline at end of file