diff --git a/src/vim.h b/src/vim.h
index 5fb0481..3f01ab7 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -783,6 +783,7 @@
 #define EXPAND_LOCALES		40
 #define EXPAND_HISTORY		41
 #define EXPAND_USER		42
+#define EXPAND_SYNTIME		43
 
 /* Values for exmode_active (0 is no exmode) */
 #define EXMODE_NORMAL		1