diff --git a/tsc/internal/bundled/libs/lib.es5.d.ts b/tsc/internal/bundled/libs/lib.es5.d.ts
index e394111cb0e6c..f8ec8286e17d7 100644
--- a/tsc/internal/bundled/libs/lib.es5.d.ts
+++ b/tsc/internal/bundled/libs/lib.es5.d.ts
@@ -1001,7 +1001,7 @@ interface RegExp {
      */
     test(string: string): boolean;
 
-    /** Returns a copy of the text of the regular expression pattern. Read-only. The regExp argument is a Regular expression object. It can be a variable name or a literal. */
+    /** Returns a copy of the text of the regular expression pattern. Read-only. */
     readonly source: string;
 
     /** Returns a Boolean value indicating the state of the global flag (g) used with a regular expression. Default is false. Read-only. */