diff --git a/src/cfnlint/helpers.py b/src/cfnlint/helpers.py
index a7bc44e641..97d5136378 100644
--- a/src/cfnlint/helpers.py
+++ b/src/cfnlint/helpers.py
@@ -230,6 +230,7 @@
 
 valid_snapshot_types = frozenset(
     [
+        "AWS::DocDB::DBCluster",
         "AWS::EC2::Volume",
         "AWS::ElastiCache::CacheCluster",
         "AWS::ElastiCache::ReplicationGroup",