diff --git a/src/mujs/VERSION b/src/mujs/VERSION
index 1f54a82..3dfd330 100644
--- a/src/mujs/VERSION
+++ b/src/mujs/VERSION
@@ -1 +1 @@
-commit 32064e10caa45e68fc87331ca53d042049cc9396
+commit 76bd203f63d3c64fd54955caae4ca831b8e1cdff
diff --git a/src/mujs/jslex.c b/src/mujs/jslex.c
index 6dee5f2..cebd8ab 100644
--- a/src/mujs/jslex.c
+++ b/src/mujs/jslex.c
@@ -477,7 +477,7 @@ static int isregexpcontext(int last)
 static int lexregexp(js_State *J)
 {
 	const char *s;
-	int g, m, i;
+	int g, m, i, flags;
 	int inclass = 0;
 
 	/* already consumed initial '/' */
@@ -525,10 +525,12 @@ static int lexregexp(js_State *J)
 		jsY_error(J, "duplicated flag in regular expression");
 
 	J->text = s;
-	J->number = 0;
-	if (g) J->number += JS_REGEXP_G;
-	if (i) J->number += JS_REGEXP_I;
-	if (m) J->number += JS_REGEXP_M;
+
+	flags = 0;
+	if (g) flags |= JS_REGEXP_G;
+	if (i) flags |= JS_REGEXP_I;
+	if (m) flags |= JS_REGEXP_M;
+	J->number = flags;
 	return TK_REGEXP;
 }