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Diffstat (limited to 'cpukit/libfs/src/dosfs/msdos_misc.c')
-rw-r--r--cpukit/libfs/src/dosfs/msdos_misc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/cpukit/libfs/src/dosfs/msdos_misc.c b/cpukit/libfs/src/dosfs/msdos_misc.c
index 67573b8505..e6dfb415b4 100644
--- a/cpukit/libfs/src/dosfs/msdos_misc.c
+++ b/cpukit/libfs/src/dosfs/msdos_misc.c
@@ -65,7 +65,7 @@ msdos_is_valid_name_char(const char ch)
if (strchr(" +,;=[]", ch) != NULL)
return MSDOS_NAME_LONG;
- if ((ch == '.') || isalnum((int)ch) ||
+ if ((ch == '.') || isalnum((unsigned char)ch) ||
(strchr("$%'-_@~`!(){}^#&", ch) != NULL))
return MSDOS_NAME_SHORT;