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-rw-r--r--ext/mbstring/php_mbregex.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/mbstring/php_mbregex.c b/ext/mbstring/php_mbregex.c
index b3f812fb48..33f1ad1653 100644
--- a/ext/mbstring/php_mbregex.c
+++ b/ext/mbstring/php_mbregex.c
@@ -501,7 +501,7 @@ PHP_FUNCTION(mb_regex_encoding)
zend_get_parameters_ex(1, &arg1) != FAILURE) {
convert_to_string_ex(arg1);
mbctype = php_mb_regex_name2mbctype(Z_STRVAL_PP(arg1));
- if (mbctype < 0) {
+ if (mbctype == ONIG_ENCODING_UNDEF) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unknown encoding \"%s\"", Z_STRVAL_PP(arg1));
RETVAL_FALSE;
} else {