1 files changed, 2 insertions, 2 deletions
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index 8666c84bbef..e8e7828e465 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -1074,10 +1074,9 @@ impl Parser {
     // This version of parse arg doesn't necessarily require
     // identifier names.
     pub fn parse_arg_general(&self, require_name: bool) -> arg {
-        let mut is_mutbl = false;
+        let mut is_mutbl = self.eat_keyword(keywords::Mut);
         let pat = if require_name || self.is_named_argument() {
             self.parse_arg_mode();
-            is_mutbl = self.eat_keyword(keywords::Mut);
             let pat = self.parse_pat();
 
             if is_mutbl && !ast_util::pat_is_ident(pat) {
@@ -1087,6 +1086,7 @@ impl Parser {
             self.expect(&token::COLON);
             pat
         } else {
+            is_mutbl = false;
             ast_util::ident_to_pat(self.get_id(),
                                    *self.last_span,
                                    special_idents::invalid)