diff --git a/platform/vcs-api/src/com/intellij/openapi/vcs/ProjectLevelVcsManager.java b/platform/vcs-api/src/com/intellij/openapi/vcs/ProjectLevelVcsManager.java
index bc201125846b..28e4f9425f59 100644
--- a/platform/vcs-api/src/com/intellij/openapi/vcs/ProjectLevelVcsManager.java
+++ b/platform/vcs-api/src/com/intellij/openapi/vcs/ProjectLevelVcsManager.java
@@ -272,7 +272,7 @@ public abstract class ProjectLevelVcsManager {
   public abstract VcsHistoryCache getVcsHistoryCache();
   public abstract ContentRevisionCache getContentRevisionCache();
   public abstract boolean isFileInContent(final VirtualFile vf);
-  public abstract boolean isIgnored(VirtualFile vf);
+  public abstract boolean isIgnored(@NotNull VirtualFile vf);
 
   @NotNull
   public abstract VcsAnnotationLocalChangesListener getAnnotationLocalChangesListener();
diff --git a/platform/vcs-impl/src/com/intellij/openapi/vcs/impl/ProjectLevelVcsManagerImpl.java b/platform/vcs-impl/src/com/intellij/openapi/vcs/impl/ProjectLevelVcsManagerImpl.java
index ecbe0572c6c0..a1dd473342b9 100644
--- a/platform/vcs-impl/src/com/intellij/openapi/vcs/impl/ProjectLevelVcsManagerImpl.java
+++ b/platform/vcs-impl/src/com/intellij/openapi/vcs/impl/ProjectLevelVcsManagerImpl.java
@@ -845,7 +845,7 @@ public class ProjectLevelVcsManagerImpl extends ProjectLevelVcsManagerEx impleme
   }
 
   @Override
-  public boolean isIgnored(VirtualFile vf) {
+  public boolean isIgnored(@NotNull VirtualFile vf) {
     return ReadAction.compute(() -> {
       if (myProject.isDisposed()) return false;