diff --git a/js/src/jsgcinlines.h b/js/src/jsgcinlines.h
index 1f76c8c005aa..8a16e7164e6e 100644
--- a/js/src/jsgcinlines.h
+++ b/js/src/jsgcinlines.h
@@ -481,10 +481,8 @@ typedef CompartmentsIterT<GCZoneGroupIter> GCCompartmentGroupIter;
  */
 template <AllowGC allowGC>
 inline JSObject *
-TryNewNurseryObject(ThreadSafeContext *cxArg, size_t thingSize, size_t nDynamicSlots)
+TryNewNurseryObject(JSContext *cx, size_t thingSize, size_t nDynamicSlots)
 {
-    JSContext *cx = cxArg->asJSContext();
-
     JS_ASSERT(!IsAtomsCompartment(cx->compartment()));
     JSRuntime *rt = cx->runtime();
     Nursery &nursery = rt->gc.nursery;
@@ -508,7 +506,7 @@ TryNewNurseryObject(ThreadSafeContext *cxArg, size_t thingSize, size_t nDynamicS
 #ifdef JSGC_FJGENERATIONAL
 template <AllowGC allowGC>
 inline JSObject *
-TryNewFJNurseryObject(ForkJoinContext *cx, size_t thingSize, size_t nDynamicSlots)
+TryNewNurseryObject(ForkJoinContext *cx, size_t thingSize, size_t nDynamicSlots)
 {
     ForkJoinNursery &nursery = cx->nursery();
     bool tooLarge = false;
@@ -617,7 +615,7 @@ AllocateObject(ThreadSafeContext *cx, AllocKind kind, size_t nDynamicSlots, Init
 #ifdef JSGC_GENERATIONAL
     if (cx->isJSContext() &&
         ShouldNurseryAllocate(cx->asJSContext()->nursery(), kind, heap)) {
-        JSObject *obj = TryNewNurseryObject<allowGC>(cx, thingSize, nDynamicSlots);
+        JSObject *obj = TryNewNurseryObject<allowGC>(cx->asJSContext(), thingSize, nDynamicSlots);
         if (obj)
             return obj;
     }
@@ -627,7 +625,7 @@ AllocateObject(ThreadSafeContext *cx, AllocKind kind, size_t nDynamicSlots, Init
         ShouldFJNurseryAllocate(cx->asForkJoinContext()->nursery(), kind, heap))
     {
         JSObject *obj =
-            TryNewFJNurseryObject<allowGC>(cx->asForkJoinContext(), thingSize, nDynamicSlots);
+            TryNewNurseryObject<allowGC>(cx->asForkJoinContext(), thingSize, nDynamicSlots);
         if (obj)
             return obj;
     }