diff --git a/src/comp/pretty/pprust.rs b/src/comp/pretty/pprust.rs
index 6e1dbf8eba31..1cfc22dc9603 100644
--- a/src/comp/pretty/pprust.rs
+++ b/src/comp/pretty/pprust.rs
@@ -731,6 +731,7 @@ fn do_else(&ps s, option::t[@ast::expr] els) {
                 case (some(?msg)) {
                     word(s.s, #fmt("\"%s\"", msg));
                 }
+                case (_) {}
             }
         }
         case (ast::expr_break(_)) {