diff --git a/Elevator/Elevator.c b/Elevator/Elevator.c
index 08aa61c..9b43cfb 100644
--- a/Elevator/Elevator.c
+++ b/Elevator/Elevator.c
@@ -42,7 +42,7 @@ int get_number_of_passengers_Elevator(THIS(Elevator)){
 	int num;
 	pthread_mutex_lock(&this->mutex_passenger);
 	num = this->passenger_ids->get_size(this->passenger_ids);
-	pthread_mutex_lock(&this->mutex_passenger);
+	pthread_mutex_unlock(&this->mutex_passenger);
 	return num;
 }
 
@@ -103,4 +103,4 @@ Elevator *_init_Elevator(char * name){
 	new_elevator->set_state(new_elevator, WAITING);
 
 	return new_elevator;
-}
\ No newline at end of file
+}