diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 8047c31930e..8110f8fd17a 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -1745,6 +1745,7 @@ namespace ts {
     export type EntityNameExpression = Identifier | PropertyAccessEntityNameExpression;
     export type EntityNameOrEntityNameExpression = EntityName | EntityNameExpression;
 
+    /* @internal */
     export type AccessExpression = PropertyAccessExpression | ElementAccessExpression;
 
     export interface PropertyAccessExpression extends MemberExpression, NamedDeclaration {
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index fe0d8b84527..710ff6a6710 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -4590,6 +4590,10 @@ namespace ts {
             || kind === SyntaxKind.JSDocFunctionType
             || kind === SyntaxKind.JSDocVariadicType;
     }
+
+    export function isAccessExpression(node: Node): node is AccessExpression {
+        return node.kind === SyntaxKind.PropertyAccessExpression || node.kind === SyntaxKind.ElementAccessExpression;
+    }
 }
 
 namespace ts {
@@ -5586,10 +5590,6 @@ namespace ts {
         return node.kind === SyntaxKind.ElementAccessExpression;
     }
 
-    export function isAccessExpression(node: Node): node is AccessExpression {
-        return node.kind === SyntaxKind.PropertyAccessExpression || node.kind === SyntaxKind.ElementAccessExpression;
-    }
-
     export function isCallExpression(node: Node): node is CallExpression {
         return node.kind === SyntaxKind.CallExpression;
     }