diff --git a/common.h b/common.h
index 0aac1d4..a208352 100644
--- a/common.h
+++ b/common.h
@@ -48,6 +48,7 @@
 #include "config.h"
 #include "version.h"
 
+#undef MAX
 #define MAX(a, b)  (((a) > (b)) ? (a) : (b))