diff --git a/examples/system_test/mod/Makefile b/examples/system_test/mod/Makefile
index 51844bb55db23a1972e8921dc2dabd3319d31f7f..1fa25fcca0b38c37b24ad8b25fdbb66f2dcd55cf 100644
--- a/examples/system_test/mod/Makefile
+++ b/examples/system_test/mod/Makefile
@@ -9,7 +9,7 @@ PWD     := $(shell pwd)
 all:	services_io.ko
 	cd ../bin; ln -sf  ../mod/services_io.ko services_io.ko; cd ../mod
 
-services_io.ko:	services_io.h services_io.c
+services_io.ko:	services_io.h services_io.c ../src/def.h ../src/testing_def.h
 	$(MAKE) -C $(KDIR) M=$(PWD) modules