diff --git a/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/rendering/DefaultErrorMessages.java b/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/rendering/DefaultErrorMessages.java
index 0b701eb90c1..a36a641bb32 100644
--- a/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/rendering/DefaultErrorMessages.java
+++ b/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/rendering/DefaultErrorMessages.java
@@ -338,7 +338,7 @@ public class DefaultErrorMessages {
         MAP.put(SUPERCLASS_NOT_ACCESSIBLE_FROM_INTERFACE, "Superclass is not accessible from interface");
         MAP.put(AMBIGUOUS_SUPER, "Many supertypes available, please specify the one you mean in angle brackets, e.g. 'super<Foo>'");
         MAP.put(ABSTRACT_SUPER_CALL, "Abstract member cannot be accessed directly");
-        MAP.put(NOT_A_SUPERTYPE, "Not a supertype");
+        MAP.put(NOT_A_SUPERTYPE, "Not an immediate supertype");
         MAP.put(TYPE_ARGUMENTS_REDUNDANT_IN_SUPER_QUALIFIER, "Type arguments do not need to be specified in a 'super' qualifier");
         MAP.put(USELESS_CAST, "No cast needed");
         MAP.put(CAST_NEVER_SUCCEEDS, "This cast can never succeed");