diff --git a/config.def.h b/config.def.h
index c6b40eb..d291fab 100644
--- a/config.def.h
+++ b/config.def.h
@@ -24,7 +24,14 @@ static const char *const autostart[] = {
 	NULL /* terminate */
 };
 
-/* tagging - tagcount must be no greater than 31 */
+enum {
+    VIEW_L = -1,
+    VIEW_R = 1,
+    SHIFT_L = -2,
+    SHIFT_R = 2,
+} RotateTags;
+
+/* tagging - TAGCOUNT must be no greater than 31 */
 #define TAGCOUNT (10)
 
 static int log_level = WLR_ERROR;