diff --git a/src/vim.h b/src/vim.h
index 2878541..f8090bf 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -1625,6 +1625,7 @@
  */
 #define MIN_COLUMNS	12	// minimal columns for screen
 #define MIN_LINES	2	// minimal lines for screen
+#define MIN_CMDHEIGHT	1	// minimal height for command line
 #define STATUS_HEIGHT	1	// height of a status line under a window
 #ifdef FEAT_MENU		// height of a status line under a window
 # define WINBAR_HEIGHT(wp)	(wp)->w_winbar_height