diff --git a/openflow_input/bsn_flow_checksum b/openflow_input/bsn_flow_checksum
index bfa5f3c..35b658f 100644
--- a/openflow_input/bsn_flow_checksum
+++ b/openflow_input/bsn_flow_checksum
@@ -29,6 +29,7 @@
 // governing permissions and limitations under the EPL.
 
 #version 4
+#version 5
 
 // Retrieves the checksum for every bucket in a table. The entries are ordered
 // by bucket index.