new file mode 100644
--- /dev/null
+++ b/js/src/jit-test/tests/jaeger/bug625438.js
@@ -0,0 +1,10 @@
+// vim: set ts=4 sw=4 tw=99 et:
+
+var count = 0;
+watch("x", function() {
+    count++;
+});
+for(var i=0; i<10; i++) {
+    x = 2;
+}
+assertEq(count, 10);

--- a/js/src/methodjit/MonoIC.cpp
+++ b/js/src/methodjit/MonoIC.cpp
@@ -155,17 +155,18 @@ ic::SetGlobalName(VMFrame &f, ic::MICInf
     JSScript *script = f.fp()->script();
     JSAtom *atom = script->getAtom(GET_INDEX(f.regs.pc));
     jsid id = ATOM_TO_JSID(atom);
 
     JS_ASSERT(ic->kind == ic::MICInfo::SET);
 
     const Shape *shape = obj->nativeLookup(id);
     if (!shape ||
-        !shape->hasDefaultGetterOrIsMethod() ||
+        shape->isMethod() ||
+        !shape->hasDefaultSetter() ||
         !shape->writable() ||
         !shape->hasSlot())
     {
         if (shape)
             PatchSetFallback(f, ic);
         if (ic->u.name.usePropertyCache)
             STRICT_VARIANT(stubs::SetGlobalName)(f, atom);
         else