--- a/lib/lib.Makefile
+++ b/lib/lib.Makefile
@@ -62,3 +62,6 @@ ifneq ($(DBG),yes)
     LDLIBS+=	$(shell dpkg-buildflags --get LDLIBS)
   endif
 endif
+
+CFLAGS+=$(OpenWrt_CFLAGS)
+LDFLAGS+=$(OpenWrt_LDFLAGS)
--- a/daemon/Makefile
+++ b/daemon/Makefile
@@ -1,3 +1,6 @@
+OpenWrt_CFLAGS:=$(CFLAGS)
+OpenWrt_LDFLAGS:=$(LDFLAGS)
+
 TARGET=		rtpengine
 
 with_iptables_option ?= yes
--- a/recording-daemon/Makefile
+++ b/recording-daemon/Makefile
@@ -1,3 +1,6 @@
+OpenWrt_CFLAGS:=$(CFLAGS)
+OpenWrt_LDFLAGS:=$(LDFLAGS)
+
 TARGET=		rtpengine-recording
 
 CFLAGS=		-g -Wall -Wstrict-prototypes -pthread -I. -I../lib/ -I../kernel-module/
--- a/iptables-extension/Makefile
+++ b/iptables-extension/Makefile
@@ -1,3 +1,6 @@
+OpenWrt_CFLAGS:=$(CFLAGS)
+OpenWrt_LDFLAGS:=$(LDFLAGS)
+
 CC?=gcc
 CFLAGS		= -O2 -Wall -Wstrict-prototypes -shared -fPIC
 ifneq ($(RTPENGINE_VERSION),)
@@ -22,6 +25,9 @@ else
 XTABLES = $(shell test -e /usr/include/xtables.h && echo 1)
 endif
 
+CFLAGS+=$(OpenWrt_CFLAGS)
+LDFLAGS+=$(OpenWrt_LDFLAGS)
+
 IPTABLES	= $(shell test -e /usr/include/iptables.h && echo 1)
 IP6TABLES	= $(shell test -e /usr/include/ip6tables.h && echo 1)
 
@@ -37,7 +43,7 @@ WORK=1
 module: libxt_RTPENGINE.so
 
 libxt_RTPENGINE.so: libxt_RTPENGINE.c
-	$(CC) $(CFLAGS) -o libxt_RTPENGINE.so libxt_RTPENGINE.c
+	$(CC) $(LDFLAGS) $(CFLAGS) -o libxt_RTPENGINE.so libxt_RTPENGINE.c
 
 else