diff --git a/conf/firmwares/subsystems/fixedwing/autopilot.makefile b/conf/firmwares/subsystems/fixedwing/autopilot.makefile
index f52b13f9a22..3d0ee7f738e 100644
--- a/conf/firmwares/subsystems/fixedwing/autopilot.makefile
+++ b/conf/firmwares/subsystems/fixedwing/autopilot.makefile
@@ -228,8 +228,8 @@ jsbsim.CFLAGS 		+= -DSITL -DUSE_JSBSIM
 jsbsim.srcs 		+= $(SIMDIR)/sim_ac_jsbsim.c $(SIMDIR)/sim_ac_fw.c $(SIMDIR)/sim_ac_flightgear.c
 
 # external libraries
-jsbsim.CFLAGS 		+= -I/usr/include $(shell pkg-config glib-2.0 --cflags) $(shell pcre-config --libs)
-jsbsim.LDFLAGS		+= $(shell pkg-config glib-2.0 --libs) -lglibivy -lm
+jsbsim.CFLAGS 		+= -I/usr/include $(shell pkg-config glib-2.0 --cflags)
+jsbsim.LDFLAGS		+= $(shell pkg-config glib-2.0 --libs) -lglibivy -lm $(shell pcre-config --libs)
 
 jsbsim.CFLAGS 		+= -DDOWNLINK -DPERIODIC_TELEMETRY -DDOWNLINK_TRANSPORT=IvyTransport
 jsbsim.srcs 		+= subsystems/datalink/downlink.c $(SRC_FIRMWARE)/datalink.c $(SRC_ARCH)/ivy_transport.c