MFH(r1.359): Fixed bug #21708

diff --git a/ext/standard/string.c b/ext/standard/string.c
index b202f26008590e9b93c213635b6518f4e5955721..762476f0a2e6f63f3c152efc32f79bd38086b697 100644 (file)
--- a/ext/standard/string.c
+++ b/ext/standard/string.c
@@ -1876,7 +1876,7 @@ PHP_FUNCTION(ucwords)
 
        *r = toupper((unsigned char) *r);
        for (r_end = r + Z_STRLEN_P(return_value) - 1; r < r_end; ) {
-               if (isspace((int) *r++)) {
+               if (isspace((int) *(unsigned char *)r++)) {
                        *r = toupper((unsigned char) *r);
                }
        }