diff --git a/js/src/vm/GlobalObject.cpp b/js/src/vm/GlobalObject.cpp
index a2093b5959c1..7b58c53d76dd 100644
--- a/js/src/vm/GlobalObject.cpp
+++ b/js/src/vm/GlobalObject.cpp
@@ -93,16 +93,18 @@ js::GlobalObject::getTypedObjectModule() const {
 /* static */ bool
 GlobalObject::skipDeselectedConstructor(JSContext* cx, JSProtoKey key)
 {
+#ifdef ENABLE_SHARED_ARRAY_BUFFER
     // Return true if the given constructor has been disabled at run-time.
     switch (key) {
-#ifdef ENABLE_SHARED_ARRAY_BUFFER
       case JSProto_Atomics:
       case JSProto_SharedArrayBuffer:
         return !cx->compartment()->creationOptions().getSharedMemoryAndAtomicsEnabled();
-#endif
       default:
         return false;
     }
+#else
+    return false;
+#endif
 }
 
 /* static */ bool