diff --git a/org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/LfsPrePushHook.java b/org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/LfsPrePushHook.java
index 7fd7c216a..c11ddbee2 100644
--- a/org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/LfsPrePushHook.java
+++ b/org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/LfsPrePushHook.java
@@ -180,6 +180,10 @@ private void excludeRemoteRefs(ObjectWalk walk) throws IOException {
 			if (oid == null) {
 				oid = r.getObjectId();
 			}
+			if (oid == null) {
+				// ignore (e.g. symbolic, ...)
+				continue;
+			}
 			RevObject o = walk.parseAny(oid);
 			if (o.getType() == Constants.OBJ_COMMIT
 					|| o.getType() == Constants.OBJ_TAG) {