diff --git a/lib/hafriedlander/Peg/Compiler/Rule.php b/lib/hafriedlander/Peg/Compiler/Rule.php
index 9d4b3e5..eb609a4 100644
--- a/lib/hafriedlander/Peg/Compiler/Rule.php
+++ b/lib/hafriedlander/Peg/Compiler/Rule.php
@@ -135,7 +135,7 @@ function parse_rule() {
 		((\\\\\\\\)*\\\\/) # Escaped \/, making sure to catch all the \\ first, so that we dont think \\/ is an escaped /
 		|
 		[^/]               # Anything except /
-	)*/@xu' ;
+	)*/[imsxADSUXJu]*@xu' ;
 
 	function tokenize( $str, &$tokens, $o = 0 ) {
 		$length = strlen($str);
@@ -316,4 +316,4 @@ function compile($indent) {
 		// print_r( $match ) ; return '' ;
 		return $match->render(NULL, $indent) . PHP_EOL . PHP_EOL . implode( PHP_EOL, $functions ) ;
 	}
-}
\ No newline at end of file
+}