Index: src/atomic.h
==================================================================
--- src/atomic.h
+++ src/atomic.h
@@ -11,10 +11,16 @@
  * Alternatively, it may be distributed under the terms of the GNU General
  * Public License, either version 2 or 3, which can be found in the file
  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
  * file.
  */
+
+#import "objfw-defs.h"
+
+#ifndef OF_HAVE_ATOMIC_OPS
+# error No atomic operations available!
+#endif
 
 #include <stdlib.h>
 
 #import "macros.h"