diff --git a/conf/firmwares/test_progs.makefile b/conf/firmwares/test_progs.makefile
index c2409f2852..bb815daa46 100644
--- a/conf/firmwares/test_progs.makefile
+++ b/conf/firmwares/test_progs.makefile
@@ -70,7 +70,7 @@ endif
 
 # pprz downlink/datalink
 COMMON_TELEMETRY_CFLAGS = -DDOWNLINK -DDOWNLINK_TRANSPORT=pprz_tp -DDATALINK=PPRZ
-COMMON_TELEMETRY_SRCS   = subsystems/datalink/downlink.c subsystems/datalink/pprz_transport.c
+COMMON_TELEMETRY_SRCS   = subsystems/datalink/downlink.c $(PAPARAZZI_HOME)/var/share/pprzlink/src/pprz_transport.c
 
 # check if we are using UDP
 ifneq (,$(findstring UDP, $(MODEM_DEV)))