diff --git a/platform/lang-api/src/com/intellij/openapi/project/ProjectLocatorImpl.java b/platform/lang-api/src/com/intellij/openapi/project/ProjectLocatorImpl.java
index 4b4c86e1d670..d4124635bcd9 100644
--- a/platform/lang-api/src/com/intellij/openapi/project/ProjectLocatorImpl.java
+++ b/platform/lang-api/src/com/intellij/openapi/project/ProjectLocatorImpl.java
@@ -33,14 +33,16 @@ public class ProjectLocatorImpl extends ProjectLocator {
   @Nullable
   public Project guessProjectForFile(final VirtualFile file) {
     ProjectManager projectManager = ProjectManager.getInstance();
-    if (projectManager == null || file == null) return null;
+    if (projectManager == null) return null;
     final Project[] projects = projectManager.getOpenProjects();
     if (projects.length == 0) return null;
     if (projects.length == 1 && !projects[0].isDisposed()) return projects[0];
 
-    for (Project project : projects) {
-      if (project.isInitialized() && !project.isDisposed() && ProjectRootManager.getInstance(project).getFileIndex().isInContent(file)) {
-        return project;
+    if (file != null) {
+      for (Project project : projects) {
+        if (project.isInitialized() && !project.isDisposed() && ProjectRootManager.getInstance(project).getFileIndex().isInContent(file)) {
+          return project;
+        }
       }
     }