diff --git a/sw/tools/Makefile b/sw/tools/Makefile
index e6a348ad93..ef1b56a011 100644
--- a/sw/tools/Makefile
+++ b/sw/tools/Makefile
@@ -45,11 +45,11 @@ gen_flight_plan.cmo : fp_parser.cmi fp_proc.cmi
 fp_syntax.cmo : fp_syntax.cmi
 
 
-%.out : %.ml
+%.out : %.ml Makefile
 	@echo OC $<
 	$(Q)$(OCAMLC) $(INCLUDES) -o $@ unix.cma str.cma ivy-ocaml.cma xml-light.cma lib-pprz.cma $<
 	@cat ../../pprz_src_test.sh > $@
-	@echo '$(OCAML) -I +xml-light -I +pcre -I +netstring -I $$PAPARAZZI_SRC/sw/lib/ocaml unix.cma str.cma ivy-ocaml.cma xml-light.cma pcre.cma netstring.cma lib-pprz.cma $$PAPARAZZI_BIN/$< $$*' >> $@
+	@echo '$(OCAML) -I +xml-light -I +pcre -I +netsys -I +netstring -I $$PAPARAZZI_SRC/sw/lib/ocaml unix.cma str.cma ivy-ocaml.cma xml-light.cma pcre.cma netsys.cma netstring.cma lib-pprz.cma $$PAPARAZZI_BIN/$< $$*' >> $@
 	@chmod a+x $@
 
 %.cmo : %.ml ../lib/ocaml/lib-pprz.cma