$OpenBSD$

index d003ab0..1af94f8 100644
--- js/src/jit/IonBuilder.cpp.orig	Fri Feb 20 15:40:37 2015
+++ js/src/jit/IonBuilder.cpp	Fri Feb 20 15:40:37 2015
@@ -5281,6 +5281,7 @@ IonBuilder::makeCallHelper(JSFunction *target, CallInfo &callInfo, bool cloneAtC
         // MCall accordingly.
         types::TemporaryTypeSet *thisTypes = callInfo.thisArg()->resultTypeSet();
         if (thisTypes &&
+            thisTypes->getKnownMIRType() == MIRType_Object &&
             thisTypes->isDOMClass() &&
             testShouldDOMCall(thisTypes, target, JSJitInfo::Method))
         {