@@ -309,12 +309,12 @@
 	}
 
 	((struct pre_ivar *)instance)->retainCount = 1;
 
 #if !defined(OF_HAVE_ATOMIC_OPS) && !defined(OF_AMIGAOS)
-	if OF_UNLIKELY (!of_spinlock_new(
-	    &((struct pre_ivar *)instance)->retainCountSpinlock)) {
+	if OF_UNLIKELY (of_spinlock_new(
+	    &((struct pre_ivar *)instance)->retainCountSpinlock) != 0) {
 		free(instance);
 		@throw [OFInitializationFailedException
 		    exceptionWithClass: class];
 	}
 #endif
@@ -1119,13 +1119,13 @@
 	PRE_IVARS->retainCount++;
 # ifndef OF_AMIGAOS_M68K
 	Permit();
 # endif
 #else
-	OF_ENSURE(of_spinlock_lock(&PRE_IVARS->retainCountSpinlock));
+	OF_ENSURE(of_spinlock_lock(&PRE_IVARS->retainCountSpinlock) == 0);
 	PRE_IVARS->retainCount++;
-	OF_ENSURE(of_spinlock_unlock(&PRE_IVARS->retainCountSpinlock));
+	OF_ENSURE(of_spinlock_unlock(&PRE_IVARS->retainCountSpinlock) == 0);
 #endif
 
 	return self;
 }
 
@@ -1155,13 +1155,13 @@
 	if (retainCount == 0)
 		[self dealloc];
 #else
 	int retainCount;
 
-	OF_ENSURE(of_spinlock_lock(&PRE_IVARS->retainCountSpinlock));
+	OF_ENSURE(of_spinlock_lock(&PRE_IVARS->retainCountSpinlock) == 0);
 	retainCount = --PRE_IVARS->retainCount;
-	OF_ENSURE(of_spinlock_unlock(&PRE_IVARS->retainCountSpinlock));
+	OF_ENSURE(of_spinlock_unlock(&PRE_IVARS->retainCountSpinlock) == 0);
 
 	if (retainCount == 0)
 		[self dealloc];
 #endif
 }