diff --git a/configure b/configure
index 92a0b484..600fa96c 100755
--- a/configure
+++ b/configure
@@ -3,6 +3,8 @@
 #
 INCLUDE=${1:-"$PWD/include"}
 
+TABLES=
+
 check_atm()
 {
 cat >/tmp/atmtest.c <<EOF
@@ -139,9 +141,28 @@ check_ipt()
 	if ! grep TC_CONFIG_XT Config > /dev/null
 	then
 		echo "using iptables"
+		TABLES="iptables"
+	else
+		TABLES="xtables"
 	fi
 }
 
+check_ipt_lib_dir()
+{
+	IPT_LIB_DIR=""
+	for dir in /lib /usr/lib /usr/local/lib
+	do
+		for file in $dir/$TABLES/lib*t_*so ; do
+			if [ -f $file ]; then
+				echo $dir/$TABLES
+				echo "IPT_LIB_DIR:=$dir/$TABLES" >> Config
+				return
+			fi
+		done
+	done
+	echo "not found!"
+}
+
 echo "# Generated config based on" $INCLUDE >Config
 
 echo "TC schedulers"
@@ -155,3 +176,5 @@ check_xt_old
 check_xt_old_internal_h
 check_ipt
 
+echo -n "iptables modules directory: "
+check_ipt_lib_dir
diff --git a/tc/Makefile b/tc/Makefile
index 0b5d7d3e..805c1087 100644
--- a/tc/Makefile
+++ b/tc/Makefile
@@ -77,6 +77,9 @@ TCLIB += tc_estimator.o
 TCLIB += tc_stab.o
 
 CFLAGS += -DCONFIG_GACT -DCONFIG_GACT_PROB
+ifneq ($(IPT_LIB_DIR),)
+	CFLAGS += -DIPT_LIB_DIR=\"$(IPT_LIB_DIR)\"
+endif
 
 TCSO :=
 ifeq ($(TC_CONFIG_ATM),y)