diff --git a/lib/fog/aws/requests/rds/create_db_snapshot.rb b/lib/fog/aws/requests/rds/create_db_snapshot.rb
index 244774782..1bb014808 100644
--- a/lib/fog/aws/requests/rds/create_db_snapshot.rb
+++ b/lib/fog/aws/requests/rds/create_db_snapshot.rb
@@ -26,7 +26,7 @@ module Fog
         def create_db_snapshot(identifier, name)
           response = Excon::Response.new
           if data[:snapshots][name]
-            raise Fog::AWS::RDS::IndentifierTaken.new
+            raise Fog::AWS::RDS::IdentifierTaken.new
           end
 
           server_data = data[:servers][identifier]
diff --git a/lib/fog/aws/requests/rds/delete_db_instance.rb b/lib/fog/aws/requests/rds/delete_db_instance.rb
index f98f267b8..ac9af09b6 100644
--- a/lib/fog/aws/requests/rds/delete_db_instance.rb
+++ b/lib/fog/aws/requests/rds/delete_db_instance.rb
@@ -37,8 +37,10 @@ module Fog
           unless skip_snapshot
             if server_set["ReadReplicaSourceDBInstanceIdentifier"]
               raise Fog::AWS::RDS::Error.new("InvalidParameterCombination => FinalDBSnapshotIdentifier can not be specified when deleting a replica instance")
-            elsif server_set["DBClusterIdentifier"]
+            elsif server_set["DBClusterIdentifier"] && snapshot_identifier # for cluster instances, you must pass in skip_snapshot = false, but not specify a snapshot identifier
               raise Fog::AWS::RDS::Error.new("InvalidParameterCombination => FinalDBSnapshotIdentifier can not be specified when deleting a cluster instance")
+            elsif server_set["DBClusterIdentifier"] && !snapshot_identifier && !skip_snapshot
+              #no-op
             else
               create_db_snapshot(identifier, snapshot_identifier)
             end