diff --git a/tester/group_chat_tester.c b/tester/group_chat_tester.c
index b3f8b6bf0..9e8e7c4c2 100644
--- a/tester/group_chat_tester.c
+++ b/tester/group_chat_tester.c
@@ -3144,7 +3144,7 @@ static void imdn_for_group_chat_room (void) {
 		BC_ASSERT_EQUAL((int)bctbx_list_size(participantsThatReceivedChloeMessage), 2, int, "%d");
 		for (bctbx_list_t *item = participantsThatReceivedChloeMessage; item; item = bctbx_list_next(item)) {
 			LinphoneParticipantImdnState *state = (LinphoneParticipantImdnState *)bctbx_list_get_data(item);
-			BC_ASSERT_GREATER(linphone_participant_imdn_state_get_state_change_time(state), initialTime, int, "%d");
+			BC_ASSERT_GREATER(linphone_participant_imdn_state_get_state_change_time(state), initialTime, time_t, "%d");
 			BC_ASSERT_EQUAL(linphone_participant_imdn_state_get_state(state), LinphoneChatMessageStateDeliveredToUser, int, "%d");
 			BC_ASSERT_PTR_NOT_NULL(linphone_participant_imdn_state_get_participant(state));
 		}