diff --git a/src/rustc/middle/ast_map.rs b/src/rustc/middle/ast_map.rs
index 196586fb10f6..4212614f9aa8 100644
--- a/src/rustc/middle/ast_map.rs
+++ b/src/rustc/middle/ast_map.rs
@@ -36,6 +36,7 @@ enum ast_node {
     node_arg(arg, uint),
     node_local(uint),
     node_ctor(@item),
+    node_block(blk),
 }
 
 type map = std::map::hashmap<node_id, ast_node>;
@@ -107,6 +108,11 @@ fn map_fn(fk: visit::fn_kind, decl: fn_decl, body: blk,
     visit::visit_fn(fk, decl, body, sp, id, cx, v);
 }
 
+fn map_block(b: blk, cx: ctx, v: vt) {
+    cx.map.insert(b.node.id, node_block(b));
+    visit::visit_block(b, cx, v);
+}
+
 fn number_pat(cx: ctx, pat: @pat) {
     pat_util::walk_pat(pat) {|p|
         alt p.node {
diff --git a/src/rustc/middle/ty.rs b/src/rustc/middle/ty.rs
index 9d581287470e..0e017f3f0113 100644
--- a/src/rustc/middle/ty.rs
+++ b/src/rustc/middle/ty.rs
@@ -2328,7 +2328,8 @@ fn item_path(cx: ctxt, id: ast::def_id) -> ast_map::path {
           }
 
           ast_map::node_expr(_) | ast_map::node_arg(_, _) |
-          ast_map::node_local(_) | ast_map::node_export(_, _) {
+          ast_map::node_local(_) | ast_map::node_export(_, _) |
+          ast_map::node_block(_) {
             cx.sess.bug(#fmt["cannot find item_path for node %?", node]);
           }
         }