--- a/js/xpconnect/src/XPCWrappedNative.cpp
+++ b/js/xpconnect/src/XPCWrappedNative.cpp
@@ -2205,21 +2205,16 @@ XPCWrappedNative::CallMethod(XPCCallCont
                              CallMode mode /*= CALL_METHOD */)
 {
     XPCContext* xpcc = ccx.GetXPCContext();
     NS_ASSERTION(xpcc->CallerTypeIsJavaScript(),
                  "Native caller for XPCWrappedNative::CallMethod?");
 
     nsresult rv = ccx.CanCallNow();
     if (NS_FAILED(rv)) {
-        // If the security manager is complaining then this is not really an
-        // internal error in xpconnect. So, no reason to botch the assertion.
-        NS_ASSERTION(rv == NS_ERROR_XPC_SECURITY_MANAGER_VETO,
-                     "hmm? CanCallNow failed in XPCWrappedNative::CallMethod. "
-                     "We are finding out about this late!");
         return Throw(rv, ccx);
     }
 
     DEBUG_TrackWrapperCall(ccx.GetWrapper(), mode);
 
     // set up the method index and do the security check if needed
 
     uint32_t secFlag;