diff --git a/src/librustc/middle/resolve.rs b/src/librustc/middle/resolve.rs
index 57e8150c71d9..563b36202b39 100644
--- a/src/librustc/middle/resolve.rs
+++ b/src/librustc/middle/resolve.rs
@@ -4607,6 +4607,7 @@ impl Resolver {
         return unqualified_def;
     }
 
+    // resolve a single identifier (used as a varref)
     pub fn resolve_identifier(@mut self,
                               identifier: Ident,
                               namespace: Namespace,