diff --git a/java/java-analysis-impl/src/com/intellij/codeInspection/miscGenerics/RedundantTypeArgsInspection.java b/java/java-analysis-impl/src/com/intellij/codeInspection/miscGenerics/RedundantTypeArgsInspection.java
index f94d1a600ba0..bb3c4ea3b8a9 100644
--- a/java/java-analysis-impl/src/com/intellij/codeInspection/miscGenerics/RedundantTypeArgsInspection.java
+++ b/java/java-analysis-impl/src/com/intellij/codeInspection/miscGenerics/RedundantTypeArgsInspection.java
@@ -15,6 +15,7 @@
  */
 package com.intellij.codeInspection.miscGenerics;
 
+import com.intellij.codeInsight.FileModificationService;
 import com.intellij.codeInsight.daemon.GroupNames;
 import com.intellij.codeInspection.*;
 import com.intellij.openapi.diagnostic.Logger;
@@ -150,6 +151,7 @@ public class RedundantTypeArgsInspection extends GenericsInspectionToolBase {
     @Override
     public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) {
       final PsiReferenceParameterList typeArgumentList = (PsiReferenceParameterList)descriptor.getPsiElement();
+      if (!FileModificationService.getInstance().preparePsiElementForWrite(typeArgumentList)) return;
       try {
         final PsiMethodCallExpression expr =
           (PsiMethodCallExpression)JavaPsiFacade.getInstance(project).getElementFactory().createExpressionFromText("foo()", null);