diff --git a/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/TypeConstraints.java b/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/TypeConstraints.java
index da83e4d39975..55d994171da9 100644
--- a/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/TypeConstraints.java
+++ b/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/TypeConstraints.java
@@ -436,6 +436,11 @@ public class TypeConstraints {
       return obj == this || obj instanceof Unresolved && myReference.equals(((Unresolved)obj).myReference);
     }
 
+    @Override
+    public int hashCode() {
+      return myReference.hashCode();
+    }
+
     @NotNull
     @Override
     public String toString() {