diff --git a/extensions/libxt_iface.c b/extensions/libxt_iface.c
index 10e093f..2bf4533 100644
--- a/extensions/libxt_iface.c
+++ b/extensions/libxt_iface.c
@@ -39,7 +39,6 @@ static struct option iface_mt_opts[] = {
 static void iface_print_opt(const struct xt_iface_mtinfo *info,
     const unsigned int option, const char *command)
 {
-	DEBUGP("print_option... %s", command);
 	if (info->flags & option)
 		printf(" %s", command);
 	if (info->invflags & option)
@@ -49,7 +48,6 @@ static void iface_print_opt(const struct xt_iface_mtinfo *info,
 static void iface_setflag(struct xt_iface_mtinfo *info,
     unsigned int *flags, int invert, u_int16_t flag, const char *command)
 {
-	DEBUGP("setflag... %s", command);
 	if (*flags & flag)
 		xtables_error(PARAMETER_PROBLEM,
 			"iface: \"--%s\" flag already specified", command);
@@ -64,7 +62,6 @@ static bool iface_valid_name(const char *name)
 {
 	char invalid_chars[] = ".+!*";
 
-	DEBUGP("valid_interface_name... %d %d", strcspn(name, invalid_chars), strlen(name));
 	return !((strlen(name) >= IFNAMSIZ) || (strcspn(name, invalid_chars) != strlen(name)));
 }
 
@@ -94,7 +91,6 @@ static void iface_mt_help(void)
 static int iface_mt_parse(int c, char **argv, int invert, unsigned int *flags,
     const void *entry, struct xt_entry_match **match)
 {
-	DEBUGP("parse... c:%c invert:%x", c, invert);
 	struct xt_iface_mtinfo *info = (void *)(*match)->data;
 
 	switch (c) {
@@ -159,7 +155,6 @@ static int iface_mt_parse(int c, char **argv, int invert, unsigned int *flags,
 
 static void iface_mt_check(unsigned int flags)
 {
-	DEBUGP("final_check...");
 	if (!(flags & XT_IFACE_IFACE))
 		xtables_error(PARAMETER_PROBLEM,
 			"iface: You must specify an interface");
@@ -171,7 +166,6 @@ static void iface_mt_check(unsigned int flags)
 static void iface_mt_print(const void *ip, const struct xt_entry_match *match,
     int numeric)
 {
-	DEBUGP("print...");
 	const struct xt_iface_mtinfo *info = (const void *)match->data;
 
 	printf("iface: \"%s\" [state:", info->ifname);
@@ -191,7 +185,6 @@ static void iface_mt_print(const void *ip, const struct xt_entry_match *match,
 
 static void iface_mt_save(const void *ip, const struct xt_entry_match *match)
 {
-	DEBUGP("save...");
 	const struct xt_iface_mtinfo *info = (const void *)match->data;
 
 	printf(" --iface %s", info->ifname);
@@ -241,7 +234,6 @@ static struct xtables_match iface_mt6_reg = {
 
 static void _init(void)
 {
-	DEBUGP("_init...");
 	xtables_register_match(&iface_mt_reg);
 	xtables_register_match(&iface_mt6_reg);
 }
diff --git a/extensions/xt_iface.c b/extensions/xt_iface.c
index c7511d9..6d4b2fc 100644
--- a/extensions/xt_iface.c
+++ b/extensions/xt_iface.c
@@ -4,8 +4,6 @@
  *	Original author: Gáspár Lajos <gaspar.lajos@glsys.eu>
  */
 
-#define _KERNEL 1
-
 #include <linux/if.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
@@ -43,36 +41,10 @@ static bool xt_iface_mt(const struct sk_buff *skb,
 	struct net_device *dev;
 	bool retval;
 	int i;
-	DEBUGP("match...");
-	DEBUGP("Interface: %s", info->ifname);
+
 	retval =
 	    ((dev = dev_get_by_name(&init_net, info->ifname)) != NULL);
 	if (retval) {
-#if DEBUG
-		DEBUGP("dev->flags: %#8x", dev->flags);
-		if (dev->flags & IFF_UP)
-			DEBUGP("            %#8x (UP)", IFF_UP);
-		if (dev->flags & IFF_BROADCAST)
-			DEBUGP("            %#8x (BROADCAST)", IFF_BROADCAST);
-		if (dev->flags & IFF_LOOPBACK)
-			DEBUGP("            %#8x (LOOPBACK)", IFF_LOOPBACK);
-		if (dev->flags & IFF_POINTOPOINT)
-			DEBUGP("            %#8x (POINTOPOINT)", IFF_POINTOPOINT);
-		if (dev->flags & IFF_RUNNING)
-			DEBUGP("            %#8x (RUNNING)", IFF_RUNNING);
-		if (dev->flags & IFF_NOARP)
-			DEBUGP("            %#8x (NOARP)", IFF_NOARP);
-		if (dev->flags & IFF_PROMISC)
-			DEBUGP("            %#8x (PROMISC)", IFF_PROMISC);
-		if (dev->flags & IFF_MULTICAST)
-			DEBUGP("            %#8x (MULTICAST)", IFF_MULTICAST);
-		if (dev->flags & IFF_DYNAMIC)
-			DEBUGP("            %#8x (DYNAMIC)", IFF_DYNAMIC);
-		if (dev->flags & IFF_LOWER_UP)
-			DEBUGP("            %#8x (LOWER_UP)", IFF_LOWER_UP);
-		if (dev->flags & IFF_DORMANT)
-			DEBUGP("            %#8x (DORMANT)", IFF_DORMANT);
-#endif
 		for (i=0; (i<XT_IFACE_FLAGCOUNT) && (retval); i++)
 			{
 			if (info->flags & xt_iface_lookup[i].iface_flag)
@@ -108,14 +80,12 @@ static struct xt_match xt_iface_mt_reg[] __read_mostly = {
 
 static int __init xt_iface_match_init(void)
 {
-	DEBUGP("init...\n");
 	return xt_register_matches(xt_iface_mt_reg,
 		ARRAY_SIZE(xt_iface_mt_reg));
 }
 
 static void __exit xt_iface_match_exit(void)
 {
-	DEBUGP("exit...\n");
 	xt_unregister_matches(xt_iface_mt_reg, ARRAY_SIZE(xt_iface_mt_reg));
 }
 
diff --git a/extensions/xt_iface.h b/extensions/xt_iface.h
index 1eed85f..97ac4eb 100644
--- a/extensions/xt_iface.h
+++ b/extensions/xt_iface.h
@@ -1,20 +1,9 @@
 #ifndef _LINUX_NETFILTER_XT_IFACE_H
 #define _LINUX_NETFILTER_XT_IFACE_H 1
 
-#define DEBUG 0
 #define _MODULE_NAME "iface"
 #define _MODULE_REVISION 0
 
-#if DEBUG
-#if _KERNEL
-#define DEBUGP(format, args...) printk(KERN_INFO "xt_"_MODULE_NAME": "format"\n", ##args)
-#else
-#define DEBUGP(format, args...) printf("# DEBUG: libxt_"_MODULE_NAME": "format"\n", ##args)
-#endif
-#else
-#define DEBUGP(format, args...)
-#endif
-
 #define XT_IFACE_FLAGCOUNT 11
 
 enum {