diff --git a/core/descriptors/src/org/jetbrains/jet/lang/descriptors/impl/TypeParameterDescriptorImpl.java b/core/descriptors/src/org/jetbrains/jet/lang/descriptors/impl/TypeParameterDescriptorImpl.java
index 282da0a42aa..753eb5ef96d 100644
--- a/core/descriptors/src/org/jetbrains/jet/lang/descriptors/impl/TypeParameterDescriptorImpl.java
+++ b/core/descriptors/src/org/jetbrains/jet/lang/descriptors/impl/TypeParameterDescriptorImpl.java
@@ -100,7 +100,7 @@ public class TypeParameterDescriptorImpl extends DeclarationDescriptorNonRootImp
 
     private void checkInitialized() {
         if (!initialized) {
-            throw new IllegalStateException("Type parameter descriptor in not initialized: " + nameForAssertions());
+            throw new IllegalStateException("Type parameter descriptor is not initialized: " + nameForAssertions());
         }
     }