diff --git a/sw/simulator/nps/nps_sensors_utils.c b/sw/simulator/nps/nps_sensors_utils.c
index 5544b29504..0ad6eeb4ce 100644
--- a/sw/simulator/nps/nps_sensors_utils.c
+++ b/sw/simulator/nps/nps_sensors_utils.c
@@ -16,7 +16,7 @@ void UpdateSensorLatency(double time, gpointer cur_reading, GSList **history, do
     *history = g_slist_remove_link(*history, last);
 	g_free(((struct BoozDatedSensor*)last->data)->value);
 	g_free((struct BoozDatedSensor*)last->data);
-    g_slist_free(last);
+    g_slist_free_1(last);
     last = g_slist_last(*history);
   }
   /* update sensor        */
diff --git a/sw/simulator/nps/nps_sensors_utils.h b/sw/simulator/nps/nps_sensors_utils.h
index 6f77e6e580..655dff9828 100644
--- a/sw/simulator/nps/nps_sensors_utils.h
+++ b/sw/simulator/nps/nps_sensors_utils.h
@@ -10,7 +10,7 @@ struct BoozDatedSensor {
 };
 
 /* cur_reading and sensor_reading must be of a type that can be cast to DoubleVect3* */
-extern void UpdateSensorLatency(double time, gpointer cur_reading, GSList **history, 
+extern void UpdateSensorLatency(double time, gpointer cur_reading, GSList **history,
 								double latency, gpointer sensor_reading);
 
 #endif /* NPS_SENSORS_UTILS_H */