diff --git a/include/mes/m2.h b/include/mes/m2.h
index 23bb91a4..e5604db6 100644
--- a/include/mes/m2.h
+++ b/include/mes/m2.h
@@ -101,7 +101,7 @@ struct timeval
 #define CDDR(x) CDR (CDR (x))
 #define CADAR(x) CAR (CDR (CAR (x)))
 #define CADDR(x) CAR (CDR (CDR (x)))
-#define CDADAR(x) CAR (CDR (CAR (CDR (x))))
+#define CDADR(x) CDR (CAR (CDR (x)))
 
 #endif