diff --git a/js/src/jsdbgapi.cpp b/js/src/jsdbgapi.cpp
index 9cf45022bfb..b5af6411dfb 100644
--- a/js/src/jsdbgapi.cpp
+++ b/js/src/jsdbgapi.cpp
@@ -828,12 +828,6 @@ JS_SetDebugErrorHook(JSRuntime *rt, JSDebugErrorHook hook, void *closure)
 
 /************************************************************************/
 
-JS_FRIEND_API(void)
-js_RevertVersion(JSContext *cx)
-{
-    cx->clearVersionOverride();
-}
-
 JS_PUBLIC_API(const JSDebugHooks *)
 JS_GetGlobalDebugHooks(JSRuntime *rt)
 {
diff --git a/js/src/jsdbgapi.h b/js/src/jsdbgapi.h
index 12a70126220..6e0483dcf9e 100644
--- a/js/src/jsdbgapi.h
+++ b/js/src/jsdbgapi.h
@@ -426,9 +426,6 @@ JS_SetDebugErrorHook(JSRuntime *rt, JSDebugErrorHook hook, void *closure);
 
 /************************************************************************/
 
-extern JS_FRIEND_API(void)
-js_RevertVersion(JSContext *cx);
-
 extern JS_PUBLIC_API(const JSDebugHooks *)
 JS_GetGlobalDebugHooks(JSRuntime *rt);
 
diff --git a/js/src/shell/js.cpp b/js/src/shell/js.cpp
index 924b4ff4dc5..b93f7d8fe40 100644
--- a/js/src/shell/js.cpp
+++ b/js/src/shell/js.cpp
@@ -649,15 +649,6 @@ Version(JSContext *cx, unsigned argc, jsval *vp)
     return true;
 }
 
-static JSBool
-RevertVersion(JSContext *cx, unsigned argc, jsval *vp)
-{
-    CallArgs args = CallArgsFromVp(argc, vp);
-    js_RevertVersion(cx);
-    args.rval().setUndefined();
-    return true;
-}
-
 static JSScript *
 GetTopScript(JSContext *cx)
 {
@@ -3575,10 +3566,6 @@ static const JSFunctionSpecWithHelp shell_functions[] = {
 "version([number])",
 "  Get or force a script compilation version number."),
 
-    JS_FN_HELP("revertVersion", RevertVersion, 0, 0,
-"revertVersion()",
-"  Revert previously set version number."),
-
     JS_FN_HELP("options", Options, 0, 0,
 "options([option ...])",
 "  Get or toggle JavaScript options."),
diff --git a/js/src/tests/js1_8/regress/regress-384412.js b/js/src/tests/js1_8/regress/regress-384412.js
index fa9bed6da39..92dd9bc59ab 100644
--- a/js/src/tests/js1_8/regress/regress-384412.js
+++ b/js/src/tests/js1_8/regress/regress-384412.js
@@ -137,19 +137,6 @@ function test()
   expect(["a1", "a2", "a3", "b1", "b2", "b3", "c1", "c2", "c3"] + "",
          ([a + b for (a in 'abc') for (b in '123')]) + "");
 
-/*
- * Version switching
- */
-  if (typeof version == 'function')
-  {
-    var v = version(150);
-    f = new Function("return version(arguments[0])");
-    revertVersion();
-    expect(150, f());
-    expect(150, eval("f()"));
-    expect(0, eval("f(0); f()"));
-    revertVersion();
-  }
   print("End of Tests");
 
 /*