1 files changed, 1 insertions, 1 deletions
diff --git a/src/nvim/api/vim.c b/src/nvim/api/vim.c
index 59f4721da2..f07bfb196e 100644
--- a/src/nvim/api/vim.c
+++ b/src/nvim/api/vim.c
@@ -90,7 +90,7 @@ Integer vim_strwidth(String str, Error *err)
   }
 
   char *buf = xstrndup(str.data, str.size);
-  Integer rv = mb_string2cells((char_u *)buf, -1);
+  Integer rv = (Integer) mb_string2cells((char_u *) buf);
   free(buf);
   return rv;
 }