diff --git a/src/lib/core.d.ts b/src/lib/core.d.ts
index 442921ca5a4..bffdac3a3e2 100644
--- a/src/lib/core.d.ts
+++ b/src/lib/core.d.ts
@@ -324,9 +324,9 @@ interface String {
     /**
       * Replaces text in a string, using a regular expression or search string.
       * @param searchValue A String object or string literal that represents the regular expression
-      * @param replaceValue A function that returns the replacement text.
+      * @param replacer A function that returns the replacement text.
       */
-    replace(searchValue: string, replaceValue: (substring: string, ...args: any[]) => string): string;
+    replace(searchValue: string, replacer: (substring: string, ...args: any[]) => string): string;
 
     /**
       * Replaces text in a string, using a regular expression or search string.
@@ -338,9 +338,9 @@ interface String {
     /**
       * Replaces text in a string, using a regular expression or search string.
       * @param searchValue A Regular Expression object containing the regular expression pattern and applicable flags
-      * @param replaceValue A function that returns the replacement text.
+      * @param replacer A function that returns the replacement text.
       */
-    replace(searchValue: RegExp, replaceValue: (substring: string, ...args: any[]) => string): string;
+    replace(searchValue: RegExp, replacer: (substring: string, ...args: any[]) => string): string;
 
     /**
       * Finds the first substring match in a regular expression search.
diff --git a/src/lib/es6.d.ts b/src/lib/es6.d.ts
index 767060f9848..aceac270f88 100644
--- a/src/lib/es6.d.ts
+++ b/src/lib/es6.d.ts
@@ -685,6 +685,23 @@ interface RegExp {
       */
     [Symbol.match](str: string): RegExpMatchArray;
 
+    /**
+      * Replaces text in a string, using a regular expression.
+      * @param string A String object or string literal whose contents matching against
+      *               this regular expression will be replaced
+      * @param replaceValue A String object or string literal containing the text to replace for every 
+      *                     successful match of this regular expression.
+      */
+    [Symbol.replace](string: string, replaceValue: string): string;
+
+    /**
+      * Replaces text in a string, using a regular expression.
+      * @param string A String object or string literal whose contents matching against
+      *               this regular expression will be replaced
+      * @param replacer A function that returns the replacement text.
+      */
+    [Symbol.replace](string: string, replacer: (substring: string, ...args: any[]) => string): string;
+
     /**
       * Returns a string indicating the flags of the regular expression in question. This field is read-only.
       * The characters in this string are sequenced and concatenated in the following order: