diff --git a/plugins/hg4idea/src/org/zmlx/hg4idea/provider/annotate/HgAnnotationProvider.java b/plugins/hg4idea/src/org/zmlx/hg4idea/provider/annotate/HgAnnotationProvider.java
index c584496522d0..3db95f35db7d 100644
--- a/plugins/hg4idea/src/org/zmlx/hg4idea/provider/annotate/HgAnnotationProvider.java
+++ b/plugins/hg4idea/src/org/zmlx/hg4idea/provider/annotate/HgAnnotationProvider.java
@@ -49,7 +49,7 @@ public class HgAnnotationProvider implements AnnotationProvider {
     final HgFile hgFile = new HgFile(vcsRoot, VfsUtil.virtualToIoFile(file));
     final List<HgAnnotationLine> annotationResult = (new HgAnnotateCommand(myProject)).execute(hgFile, revision);
     final List<HgFileRevision> logResult = (new HgLogCommand(myProject)).execute(hgFile, DEFAULT_LIMIT, false);
-    return new HgAnnotation(myProject, hgFile, annotationResult, logResult, revision.getRevisionNumber());
+    return new HgAnnotation(myProject, hgFile, annotationResult, logResult, revision == null ? null : revision.getRevisionNumber());
   }
 
   public boolean isAnnotationValid(VcsFileRevision rev) {