diff --git a/js/src/jsobj.cpp b/js/src/jsobj.cpp
index 40b4365f69a..c16cbf0ca5c 100644
--- a/js/src/jsobj.cpp
+++ b/js/src/jsobj.cpp
@@ -911,8 +911,8 @@ js_CheckPrincipalsAccess(JSContext *cx, JSObject *scopeobj,
     return JS_TRUE;
 }
 
-JSObject *
-js_CheckScopeChainValidity(JSContext *cx, JSObject *scopeobj, const char *caller)
+static JSObject *
+CheckScopeChainValidity(JSContext *cx, JSObject *scopeobj, const char *caller)
 {
     JSObject *inner;
 
@@ -1110,7 +1110,7 @@ obj_eval(JSContext *cx, uintN argc, Value *vp)
 #endif
 
     /* Ensure we compile this eval with the right object in the scope chain. */
-    JSObject *result = js_CheckScopeChainValidity(cx, scopeobj, js_eval_str);
+    JSObject *result = CheckScopeChainValidity(cx, scopeobj, js_eval_str);
     JS_ASSERT_IF(result, result == scopeobj);
     if (!result)
         return JS_FALSE;
diff --git a/js/src/jsobj.h b/js/src/jsobj.h
index 1f632359254..4e494f3f02a 100644
--- a/js/src/jsobj.h
+++ b/js/src/jsobj.h
@@ -1298,12 +1298,6 @@ js_GetReservedSlot(JSContext *cx, JSObject *obj, uint32 index, js::Value *vp);
 extern bool
 js_SetReservedSlot(JSContext *cx, JSObject *obj, uint32 index, const js::Value &v);
 
-/*
- * Precondition: obj must be locked.
- */
-extern JSObject *
-js_CheckScopeChainValidity(JSContext *cx, JSObject *scopeobj, const char *caller);
-
 extern JSBool
 js_CheckPrincipalsAccess(JSContext *cx, JSObject *scopeobj,
                          JSPrincipals *principals, JSAtom *caller);