diff --git a/plugins/maven/src/main/java/org/jetbrains/idea/maven/utils/MavenProblemFileHighlighter.java b/plugins/maven/src/main/java/org/jetbrains/idea/maven/utils/MavenProblemFileHighlighter.java
index 3df60f79db24..20b2b3293c0b 100644
--- a/plugins/maven/src/main/java/org/jetbrains/idea/maven/utils/MavenProblemFileHighlighter.java
+++ b/plugins/maven/src/main/java/org/jetbrains/idea/maven/utils/MavenProblemFileHighlighter.java
@@ -15,6 +15,8 @@
  */
 package org.jetbrains.idea.maven.utils;
 
+import com.intellij.openapi.application.AccessToken;
+import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.Condition;
 import com.intellij.openapi.vfs.VirtualFile;
@@ -30,7 +32,13 @@ public class MavenProblemFileHighlighter implements Condition<VirtualFile> {
   }
 
   public boolean value(final VirtualFile file) {
-    PsiFile psiFile = PsiManager.getInstance(myProject).findFile(file);
-    return psiFile != null && MavenDomUtil.isMavenFile(psiFile);
+    AccessToken accessToken = ApplicationManager.getApplication().acquireReadActionLock();
+    try {
+      PsiFile psiFile = PsiManager.getInstance(myProject).findFile(file);
+      return psiFile != null && MavenDomUtil.isMavenFile(psiFile);
+    }
+    finally {
+      accessToken.finish();
+    }
   }
 }