diff --git a/ctdb/protocol/protocol_control.c b/ctdb/protocol/protocol_control.c
index 360665caf11..71892aa1249 100644
--- a/ctdb/protocol/protocol_control.c
+++ b/ctdb/protocol/protocol_control.c
@@ -555,7 +555,7 @@ static void ctdb_req_control_data_push(struct ctdb_req_control_data *cd,
 		break;
 
 	case CTDB_CONTROL_WIPE_DATABASE:
-		ctdb_transdb_push(cd->data.transdb, buf);
+		ctdb_transdb_push(cd->data.transdb, buf, &np);
 		break;
 
 	case CTDB_CONTROL_TRY_DELETE_RECORDS:
@@ -686,11 +686,11 @@ static void ctdb_req_control_data_push(struct ctdb_req_control_data *cd,
 		break;
 
 	case CTDB_CONTROL_DB_TRANSACTION_START:
-		ctdb_transdb_push(cd->data.transdb, buf);
+		ctdb_transdb_push(cd->data.transdb, buf, &np);
 		break;
 
 	case CTDB_CONTROL_DB_TRANSACTION_COMMIT:
-		ctdb_transdb_push(cd->data.transdb, buf);
+		ctdb_transdb_push(cd->data.transdb, buf, &np);
 		break;
 
 	case CTDB_CONTROL_DB_TRANSACTION_CANCEL:
@@ -858,7 +858,7 @@ static int ctdb_req_control_data_pull(uint8_t *buf, size_t buflen,
 
 	case CTDB_CONTROL_WIPE_DATABASE:
 		ret = ctdb_transdb_pull(buf, buflen, mem_ctx,
-				       &cd->data.transdb);
+				       &cd->data.transdb, &np);
 		break;
 
 	case CTDB_CONTROL_TRY_DELETE_RECORDS:
@@ -1009,12 +1009,12 @@ static int ctdb_req_control_data_pull(uint8_t *buf, size_t buflen,
 
 	case CTDB_CONTROL_DB_TRANSACTION_START:
 		ret = ctdb_transdb_pull(buf, buflen, mem_ctx,
-					&cd->data.transdb);
+					&cd->data.transdb, &np);
 		break;
 
 	case CTDB_CONTROL_DB_TRANSACTION_COMMIT:
 		ret = ctdb_transdb_pull(buf, buflen, mem_ctx,
-					&cd->data.transdb);
+					&cd->data.transdb, &np);
 		break;
 
 	case CTDB_CONTROL_DB_TRANSACTION_CANCEL:
diff --git a/ctdb/protocol/protocol_private.h b/ctdb/protocol/protocol_private.h
index 8b3c9bcbbeb..6c253a70dd8 100644
--- a/ctdb/protocol/protocol_private.h
+++ b/ctdb/protocol/protocol_private.h
@@ -221,10 +221,10 @@ void ctdb_addr_info_push(struct ctdb_addr_info *in, uint8_t *buf,
 int ctdb_addr_info_pull(uint8_t *buf, size_t buflen, TALLOC_CTX *mem_ctx,
 			struct ctdb_addr_info **out, size_t *npull);
 
-size_t ctdb_transdb_len(struct ctdb_transdb *transdb);
-void ctdb_transdb_push(struct ctdb_transdb *transdb, uint8_t *buf);
+size_t ctdb_transdb_len(struct ctdb_transdb *in);
+void ctdb_transdb_push(struct ctdb_transdb *in, uint8_t *buf, size_t *npush);
 int ctdb_transdb_pull(uint8_t *buf, size_t buflen, TALLOC_CTX *mem_ctx,
-		     struct ctdb_transdb **out);
+		     struct ctdb_transdb **out, size_t *npull);
 
 size_t ctdb_uptime_len(struct ctdb_uptime *uptime);
 void ctdb_uptime_push(struct ctdb_uptime *uptime, uint8_t *buf);
diff --git a/ctdb/protocol/protocol_types.c b/ctdb/protocol/protocol_types.c
index 90091ff1b4c..8de43ec2714 100644
--- a/ctdb/protocol/protocol_types.c
+++ b/ctdb/protocol/protocol_types.c
@@ -3259,32 +3259,56 @@ fail:
 	return ret;
 }
 
-size_t ctdb_transdb_len(struct ctdb_transdb *transdb)
+size_t ctdb_transdb_len(struct ctdb_transdb *in)
 {
-	return sizeof(struct ctdb_transdb);
+	return ctdb_uint32_len(&in->db_id) +
+		ctdb_uint32_len(&in->tid);
 }
 
-void ctdb_transdb_push(struct ctdb_transdb *transdb, uint8_t *buf)
+void ctdb_transdb_push(struct ctdb_transdb *in, uint8_t *buf, size_t *npush)
 {
-	memcpy(buf, transdb, sizeof(struct ctdb_transdb));
+	size_t offset = 0, np;
+
+	ctdb_uint32_push(&in->db_id, buf+offset, &np);
+	offset += np;
+
+	ctdb_uint32_push(&in->tid, buf+offset, &np);
+	offset += np;
+
+	*npush = offset;
 }
 
 int ctdb_transdb_pull(uint8_t *buf, size_t buflen, TALLOC_CTX *mem_ctx,
-		     struct ctdb_transdb **out)
+		     struct ctdb_transdb **out, size_t *npull)
 {
-	struct ctdb_transdb *transdb;
+	struct ctdb_transdb *val;
+	size_t offset = 0, np;
+	int ret;
 
-	if (buflen < sizeof(struct ctdb_transdb)) {
-		return EMSGSIZE;
-	}
-
-	transdb = talloc_memdup(mem_ctx, buf, sizeof(struct ctdb_transdb));
-	if (transdb == NULL) {
+	val = talloc(mem_ctx, struct ctdb_transdb);
+	if (val == NULL) {
 		return ENOMEM;
 	}
 
-	*out = transdb;
+	ret = ctdb_uint32_pull(buf+offset, buflen-offset, &val->db_id, &np);
+	if (ret != 0) {
+		goto fail;
+	}
+	offset += np;
+
+	ret = ctdb_uint32_pull(buf+offset, buflen-offset, &val->tid, &np);
+	if (ret != 0) {
+		goto fail;
+	}
+	offset += np;
+
+	*out = val;
+	*npull = offset;
 	return 0;
+
+fail:
+	talloc_free(val);
+	return ret;
 }
 
 size_t ctdb_uptime_len(struct ctdb_uptime *uptime)
diff --git a/ctdb/tests/src/protocol_types_compat_test.c b/ctdb/tests/src/protocol_types_compat_test.c
index 040d1a57e57..5c13ceea4f4 100644
--- a/ctdb/tests/src/protocol_types_compat_test.c
+++ b/ctdb/tests/src/protocol_types_compat_test.c
@@ -1109,6 +1109,35 @@ static int ctdb_addr_info_pull_old(uint8_t *buf, size_t buflen,
 	return 0;
 }
 
+static size_t ctdb_transdb_len_old(struct ctdb_transdb *in)
+{
+	return sizeof(struct ctdb_transdb);
+}
+
+static void ctdb_transdb_push_old(struct ctdb_transdb *in, uint8_t *buf)
+{
+	memcpy(buf, in, sizeof(struct ctdb_transdb));
+}
+
+static int ctdb_transdb_pull_old(uint8_t *buf, size_t buflen,
+				 TALLOC_CTX *mem_ctx,
+				 struct ctdb_transdb **out)
+{
+	struct ctdb_transdb *val;
+
+	if (buflen < sizeof(struct ctdb_transdb)) {
+		return EMSGSIZE;
+	}
+
+	val = talloc_memdup(mem_ctx, buf, sizeof(struct ctdb_transdb));
+	if (val == NULL) {
+		return ENOMEM;
+	}
+
+	*out = val;
+	return 0;
+}
+
 
 COMPAT_TYPE3_TEST(struct ctdb_statistics, ctdb_statistics);
 COMPAT_TYPE3_TEST(struct ctdb_vnn_map, ctdb_vnn_map);
@@ -1132,6 +1161,7 @@ COMPAT_TYPE3_TEST(struct ctdb_var_list, ctdb_var_list);
 COMPAT_TYPE3_TEST(struct ctdb_tunable_list, ctdb_tunable_list);
 COMPAT_TYPE3_TEST(struct ctdb_tickle_list, ctdb_tickle_list);
 COMPAT_TYPE3_TEST(struct ctdb_addr_info, ctdb_addr_info);
+COMPAT_TYPE3_TEST(struct ctdb_transdb, ctdb_transdb);
 
 int main(int argc, char *argv[])
 {
@@ -1160,6 +1190,7 @@ int main(int argc, char *argv[])
 	COMPAT_TEST_FUNC(ctdb_tunable_list)();
 	COMPAT_TEST_FUNC(ctdb_tickle_list)();
 	COMPAT_TEST_FUNC(ctdb_addr_info)();
+	COMPAT_TEST_FUNC(ctdb_transdb)();
 
 	return 0;
 }
diff --git a/ctdb/tests/src/protocol_types_test.c b/ctdb/tests/src/protocol_types_test.c
index 3db2722fde4..bd9c6e31411 100644
--- a/ctdb/tests/src/protocol_types_test.c
+++ b/ctdb/tests/src/protocol_types_test.c
@@ -68,7 +68,7 @@ PROTOCOL_TYPE3_TEST(struct ctdb_var_list, ctdb_var_list);
 PROTOCOL_TYPE3_TEST(struct ctdb_tunable_list, ctdb_tunable_list);
 PROTOCOL_TYPE3_TEST(struct ctdb_tickle_list, ctdb_tickle_list);
 PROTOCOL_TYPE3_TEST(struct ctdb_addr_info, ctdb_addr_info);
-DEFINE_TEST(struct ctdb_transdb, ctdb_transdb);
+PROTOCOL_TYPE3_TEST(struct ctdb_transdb, ctdb_transdb);
 DEFINE_TEST(struct ctdb_uptime, ctdb_uptime);
 DEFINE_TEST(struct ctdb_public_ip, ctdb_public_ip);
 DEFINE_TEST(struct ctdb_public_ip_list, ctdb_public_ip_list);