@@ -119,10 +119,12 @@
 # define OF_DRAGONFLYBSD
 #elif defined(__ANDROID__)
 # define OF_ANDROID
 #elif defined(__HAIKU__)
 # define OF_HAIKU
+#elif defined(_AIX)
+# define OF_AIX
 #elif defined(__MORPHOS__)
 # ifndef __ixemul__
 #  define OF_MORPHOS
 #  define OF_AMIGAOS
 # else