diff --git a/typedefs.h b/typedefs.h
index 825a7de..5405f66 100644
--- a/typedefs.h
+++ b/typedefs.h
@@ -50,3 +50,5 @@
 #define DOT 612
 #define RESERVE 613
 #define RELEASE 614
+// comments
+#define COMMENT 700