diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 7e393c5a35a..fef23ebdcf1 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -3331,7 +3331,7 @@ namespace ts {
     }
 
     export function isParameter(node: Node): node is ParameterDeclaration {
-        return node.kind === SyntaxKind.Parameter;
+        return node.kind === SyntaxKind.Parameter && ((node as ParameterDeclaration).name as Identifier).text !== "this";
     }
 
     export function isDecorator(node: Node): node is Decorator {