diff --git a/kernel-module/.gitignore b/kernel-module/.gitignore
index f3e89fc5e..54405a797 100644
--- a/kernel-module/.gitignore
+++ b/kernel-module/.gitignore
@@ -7,3 +7,4 @@ Module.symvers
 rtpengine.mk
 .*.cmd
 xt_RTPENGINE.mod
+rtpengine-kmod.mk
diff --git a/kernel-module/Makefile b/kernel-module/Makefile
index 161c4513e..954f4c295 100644
--- a/kernel-module/Makefile
+++ b/kernel-module/Makefile
@@ -4,7 +4,7 @@ M      ?= $(CURDIR)
 
 export M
 
-include rtpengine-kmod.mk
+include $(M)/rtpengine-kmod.mk
 
 EXTRA_CFLAGS+=	-DRTPENGINE_VERSION="\"$(RTPENGINE_VERSION)\""
 
@@ -26,5 +26,5 @@ install:
 	install -D xt_RTPENGINE.ko $(DESTDIR)/lib/modules/$(shell uname -r)/updates/xt_RTPENGINE.ko
 	depmod -a
 
-rtpengine-kmod.mk:
-	./gen-rtpengine-kmod-flags >$@
+$(M)/rtpengine-kmod.mk:
+	$(M)/gen-rtpengine-kmod-flags >$@