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-rw-r--r--ext/standard/strnatcmp.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/ext/standard/strnatcmp.c b/ext/standard/strnatcmp.c
index face191a6e..4b07740bea 100644
--- a/ext/standard/strnatcmp.c
+++ b/ext/standard/strnatcmp.c
@@ -117,11 +117,11 @@ PHPAPI int strnatcmp_ex(char const *a, size_t a_len, char const *b, size_t b_len
ca = *ap; cb = *bp;
/* skip over leading zeros */
- while (leading && ca == '0' && (ap+1 < aend) && isdigit(*(ap+1))) {
+ while (leading && ca == '0' && (ap+1 < aend) && isdigit((int)(unsigned char)*(ap+1))) {
ca = *++ap;
}
- while (leading && cb == '0' && (bp+1 < bend) && isdigit(*(bp+1))) {
+ while (leading && cb == '0' && (bp+1 < bend) && isdigit((int)(unsigned char)*(bp+1))) {
cb = *++bp;
}