diff --git a/js/src/vm/NativeObject.h b/js/src/vm/NativeObject.h
index 35d26a6778..3a0035a760 100644
--- a/js/src/vm/NativeObject.h
+++ b/js/src/vm/NativeObject.h
@@ -859,10 +859,8 @@ class NativeObject : public ShapedObject
 
     // Check requirements on values stored to this object.
     MOZ_ALWAYS_INLINE void checkStoredValue(const Value& v) {
-        if (!IsObjectValueInCompartment(v, compartment()))
-    MOZ_CRASH("compartment mismatch");
-        if (!AtomIsMarked(zoneFromAnyThread(), v))
-    MOZ_CRASH("AtomIsMarked failed");
+        MOZ_ASSERT(IsObjectValueInCompartment(v, compartment()));
+        MOZ_ASSERT(AtomIsMarked(zoneFromAnyThread(), v));
     }
 
     MOZ_ALWAYS_INLINE void setSlot(uint32_t slot, const Value& value) {