1 files changed, 3 insertions, 0 deletions
diff --git a/random.c b/random.c
index 6b6d5d7045..b00675d771 100644
--- a/random.c
+++ b/random.c
@@ -133,6 +133,9 @@ genrand_real()
     /* divided by 2^32 */
 }
 
+#undef N
+#undef M
+
 /* These real versions are due to Isaku Wada, 2002/01/09 added */
 
 #include "ruby.h"