diff --git a/ghc/lib/std/cbits/getClockTime.c b/ghc/lib/std/cbits/getClockTime.c
index 06ba5fea3c3d425a300807f9dcfcac581ebeabce..0aa8e0614f00387bf386274f6394c91be562be63 100644
--- a/ghc/lib/std/cbits/getClockTime.c
+++ b/ghc/lib/std/cbits/getClockTime.c
@@ -1,11 +1,15 @@
 /* 
  * (c) The GRASP/AQUA Project, Glasgow University, 1994-1998
  *
- * $Id: getClockTime.c,v 1.7 1999/10/20 10:08:33 sof Exp $
+ * $Id: getClockTime.c,v 1.8 1999/10/26 09:34:09 sof Exp $
  *
  * getClockTime Runtime Support
  */
 
+#ifndef _AIX
+#define NON_POSIX_SOURCE    /* gettimeofday */
+#endif
+
 #include "Rts.h"
 #include "stgio.h"