diff --git a/test/default/cmptest.h b/test/default/cmptest.h
index bf3ddb68..6df1c133 100644
--- a/test/default/cmptest.h
+++ b/test/default/cmptest.h
@@ -34,7 +34,9 @@ int xmain(void);
 
 # include <sys/time.h>
 
-# define ITERATIONS 256
+# ifndef ITERATIONS
+#  define ITERATIONS 128
+# endif
 
 static unsigned long long now(void)
 {