Index: src/atomic.h
==================================================================
--- src/atomic.h
+++ src/atomic.h
@@ -25,11 +25,11 @@
 
 #if !defined(OF_HAVE_THREADS)
 # import "atomic_no_threads.h"
 #elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
 # import "atomic_x86.h"
-#elif defined(OF_POWERPC_ASM) && !defined(__APPLE_CC__)
+#elif defined(OF_POWERPC_ASM) && !defined(__APPLE_CC__) && !defined(OF_AIX)
 # import "atomic_powerpc.h"
 #elif defined(OF_HAVE_ATOMIC_BUILTINS)
 # import "atomic_builtins.h"
 #elif defined(OF_HAVE_SYNC_BUILTINS)
 # import "atomic_sync_builtins.h"