diff --git a/conf/firmwares/subsystems/fixedwing/fdm_jsbsim.makefile b/conf/firmwares/subsystems/fixedwing/fdm_jsbsim.makefile
index 20b6e7fadd..de5b2463b3 100644
--- a/conf/firmwares/subsystems/fixedwing/fdm_jsbsim.makefile
+++ b/conf/firmwares/subsystems/fixedwing/fdm_jsbsim.makefile
@@ -63,6 +63,7 @@ nps.srcs += $(NPSDIR)/nps_main.c                 \
        $(NPSDIR)/nps_ivy_fixedwing.c             \
        $(NPSDIR)/nps_flightgear.c                \
 
+nps.srcs += math/pprz_geodetic_wmm2010.c
 
 nps.CFLAGS += -DDOWNLINK -DPERIODIC_TELEMETRY -DDOWNLINK_TRANSPORT=IvyTransport
 nps.srcs   += subsystems/datalink/downlink.c $(SRC_FIRMWARE)/datalink.c $(SRC_ARCH)/ivy_transport.c
diff --git a/conf/firmwares/subsystems/rotorcraft/fdm_jsbsim.makefile b/conf/firmwares/subsystems/rotorcraft/fdm_jsbsim.makefile
index 70b69e9935..4e3741ac9b 100644
--- a/conf/firmwares/subsystems/rotorcraft/fdm_jsbsim.makefile
+++ b/conf/firmwares/subsystems/rotorcraft/fdm_jsbsim.makefile
@@ -92,7 +92,7 @@ nps.srcs   += subsystems/commands.c
 #
 # Math functions
 #
-nps.srcs += math/pprz_geodetic_int.c math/pprz_geodetic_float.c math/pprz_geodetic_double.c math/pprz_trig_int.c math/pprz_orientation_conversion.c
+nps.srcs += math/pprz_geodetic_int.c math/pprz_geodetic_float.c math/pprz_geodetic_double.c math/pprz_trig_int.c math/pprz_orientation_conversion.c math/pprz_geodetic_wmm2010.c
 
 nps.srcs += subsystems/air_data.c