diff --git a/conf/firmwares/subsystems/shared/gps_piksi.makefile b/conf/firmwares/subsystems/shared/gps_piksi.makefile
index d17a135bee..87f063cf8a 100644
--- a/conf/firmwares/subsystems/shared/gps_piksi.makefile
+++ b/conf/firmwares/subsystems/shared/gps_piksi.makefile
@@ -8,7 +8,7 @@ GPS_PORT_LOWER=$(shell echo $(GPS_PORT) | tr A-Z a-z)
 
 ap.CFLAGS += -DUSE_GPS
 ap.CFLAGS += -DUSE_$(GPS_PORT) -D$(GPS_PORT)_BAUD=B115200
-ap.CFLAGS += -DGPS_LINK=$(GPS_PORT_LOWER)
+ap.CFLAGS += -DPIKSI_GPS_LINK=$(GPS_PORT_LOWER)
 
 ifneq ($(GPS_LED),none)
   ap.CFLAGS += -DGPS_LED=$(GPS_LED)