diff --git a/src/vim.h b/src/vim.h
index 05af5a1..22fe8d5 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -777,6 +777,7 @@
 #define EXPAND_MAPCLEAR		47
 #define EXPAND_ARGLIST		48
 #define EXPAND_DIFF_BUFFERS	49
+#define EXPAND_DISASSEMBLE	50
 
 // Values for exmode_active (0 is no exmode)
 #define EXMODE_NORMAL		1