diff --git a/include/mes/m2.h b/include/mes/m2.h
index e5604db6..b6aaf3cc 100644
--- a/include/mes/m2.h
+++ b/include/mes/m2.h
@@ -100,8 +100,9 @@ struct timeval
 #define CDAR(x) CDR (CAR (x))
 #define CDDR(x) CDR (CDR (x))
 #define CADAR(x) CAR (CDR (CAR (x)))
-#define CADDR(x) CAR (CDR (CDR (x)))
+#define CDDAR(x) CDR (CDR (CAR (x)))
 #define CDADR(x) CDR (CAR (CDR (x)))
+#define CADDR(x) CAR (CDR (CDR (x)))
 
 #endif