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-rw-r--r--file.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/file.c b/file.c
index 54d36c93..37a3ec1 100644
--- a/file.c
+++ b/file.c
@@ -1252,7 +1252,7 @@ rb_file_s_expand_path(argc, argv)
}
#if defined DOSISH
/* skip drive letter */
- else if (isalpha(s[0]) && s[1] == ':' && isdirsep(s[2])) {
+ else if (ISALPHA(s[0]) && s[1] == ':' && isdirsep(s[2])) {
while (*s && !isdirsep(*s)) {
*p++ = *s++;
}