1 files changed, 3 insertions, 1 deletions
diff --git a/src/nvim/main.c b/src/nvim/main.c
index 0b0948373a..387b90395f 100644
--- a/src/nvim/main.c
+++ b/src/nvim/main.c
@@ -7,6 +7,7 @@
  */
 
 #define EXTERN
+#include <assert.h>
 #include <errno.h>
 #include <inttypes.h>
 #include <string.h>
@@ -293,7 +294,8 @@ int main(int argc, char **argv)
   if (params.diff_mode)
     diff_win_options(firstwin, FALSE);
 
-  cmdline_row = Rows - p_ch;
+  assert(p_ch >= 0 && Rows >= p_ch && Rows - p_ch <= INT_MAX);
+  cmdline_row = (int)(Rows - p_ch);
   msg_row = cmdline_row;
   screenalloc(false);           /* allocate screen buffers */
   set_init_2();