diff --git a/server/actions/regex/solve.php b/server/actions/regex/solve.php
index f79fb62f..70f2c830 100644
--- a/server/actions/regex/solve.php
+++ b/server/actions/regex/solve.php
@@ -101,7 +101,7 @@ function pcreList($pattern, $modifiers, $source, $str) {
 		}
 
 		function pcreReplace($pattern, $modifiers, $text, $input) {
-				return mb_ereg_replace("/{$pattern}/{$modifiers}", $input, $text);
+                return preg_replace("/{$pattern}/{$modifiers}", $input, $text);
 		}
 
 		function pcreMatch($pattern, $modifiers, $global, $text) {