diff --git a/src/bin/pg_upgrade/controldata.c b/src/bin/pg_upgrade/controldata.c
index 41b8f69b8c..0ee138a1da 100644
--- a/src/bin/pg_upgrade/controldata.c
+++ b/src/bin/pg_upgrade/controldata.c
@@ -493,7 +493,6 @@ get_control_data(ClusterInfo *cluster, bool live_check)
 				pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 
 			p++;				/* remove ':' char */
-			/* used later for contrib check */
 			cluster->controldata.data_checksum_version = str2uint(p);
 			got_data_checksum_version = true;
 		}
diff --git a/src/bin/pg_upgrade/pg_upgrade.h b/src/bin/pg_upgrade/pg_upgrade.h
index 55de244ac0..19ca68ed61 100644
--- a/src/bin/pg_upgrade/pg_upgrade.h
+++ b/src/bin/pg_upgrade/pg_upgrade.h
@@ -216,7 +216,7 @@ typedef struct
 	uint32		large_object;
 	bool		date_is_int;
 	bool		float8_pass_by_value;
-	bool		data_checksum_version;
+	uint32		data_checksum_version;
 } ControlData;
 
 /*