1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsyntax/parse/mod.rs b/src/libsyntax/parse/mod.rs
index cdb67129c35..22e659fa574 100644
--- a/src/libsyntax/parse/mod.rs
+++ b/src/libsyntax/parse/mod.rs
@@ -214,7 +214,7 @@ pub fn next_node_id(sess: @mut ParseSess) -> node_id {
     let rv = sess.next_id;
     sess.next_id += 1;
     // ID 0 is reserved for the crate and doesn't actually exist in the AST
-    fail_unless!(rv != 0);
+    assert!(rv != 0);
     return rv;
 }