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-rw-r--r--src/ex_docmd.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 64ab247846..e51f84997d 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -2747,7 +2747,7 @@ checkforcmd_opt(
for (i = 0; cmd[i] != NUL; ++i)
if (((char_u *)cmd)[i] != (*pp)[i])
break;
- if (i >= len && !isalpha((*pp)[i]) && (*pp)[i] != '_'
+ if (i >= len && !ASCII_ISALPHA((*pp)[i]) && (*pp)[i] != '_'
&& (!noparen || ((*pp)[i] != '(' && (*pp)[i] != '.')))
{
*pp = skipwhite(*pp + i);