diff --git a/idea/src/org/jetbrains/jet/resolve/DescriptorRenderer.java b/idea/src/org/jetbrains/jet/resolve/DescriptorRenderer.java
index f6a46d59fa4..2261bbaea69 100644
--- a/idea/src/org/jetbrains/jet/resolve/DescriptorRenderer.java
+++ b/idea/src/org/jetbrains/jet/resolve/DescriptorRenderer.java
@@ -79,7 +79,7 @@ public class DescriptorRenderer {
     }
 
     public String renderType(JetType type) {
-        return "" + type;
+        return escape(type.toString());
     }
 
     protected String escape(String s) {