diff --git a/sw/airborne/sim/sim_ap.c b/sw/airborne/sim/sim_ap.c
index dc9792431f..3dbbd3628e 100644
--- a/sw/airborne/sim/sim_ap.c
+++ b/sw/airborne/sim/sim_ap.c
@@ -26,12 +26,18 @@
 #include <caml/mlvalues.h>
 #include <caml/memory.h>
 
+
+/* Dummy definitions to replace the ones from the files not compiled in the
+   simulator */
 uint8_t ir_estim_mode;
 uint8_t vertical_mode;
 uint8_t inflight_calib_mode;
 bool_t rc_event_1, rc_event_2;
 bool_t launch;
 uint8_t gps_nb_ovrn, modem_nb_ovrn, link_fbw_fbw_nb_err, link_fbw_nb_err;
+float attitude_pgain;
+float roll_rate_pgain;
+
 
 
 uint8_t ac_id;