1 files changed, 1 insertions, 1 deletions
diff --git a/java/java-impl/src/com/intellij/codeInsight/daemon/impl/quickfix/CreateFromUsageBaseFix.java b/java/java-impl/src/com/intellij/codeInsight/daemon/impl/quickfix/CreateFromUsageBaseFix.java
index abe9368374e8..9e8684899939 100644
--- a/java/java-impl/src/com/intellij/codeInsight/daemon/impl/quickfix/CreateFromUsageBaseFix.java
+++ b/java/java-impl/src/com/intellij/codeInsight/daemon/impl/quickfix/CreateFromUsageBaseFix.java
@@ -475,7 +475,7 @@ public abstract class CreateFromUsageBaseFix extends BaseIntentionAction {
       } else {
         while (true) {
           final String paramName = idx > 0 ? "T" + idx : "T";
-          if (!typeParamNames.contains(paramName)) {
+          if (typeParamNames.add(paramName)) {
             targetClass.getTypeParameterList().add(factory.createTypeParameterFromText(paramName, null));
             break;
           }