diff --git a/extensions/xt_iface.c b/extensions/xt_iface.c
index bc3b7a3..df3e4a3 100644
--- a/extensions/xt_iface.c
+++ b/extensions/xt_iface.c
@@ -12,6 +12,11 @@
 #include <linux/netfilter/x_tables.h>
 #include "xt_iface.h"
 
+struct xt_iface_flag_pairs {
+	uint16_t iface_flag;
+	uint32_t iff_flag;
+};
+
 MODULE_AUTHOR("Gáspár Lajos <gaspar.lajos@glsys.eu>");
 MODULE_DESCRIPTION("Xtables: iface match module");
 MODULE_LICENSE("GPL");
diff --git a/extensions/xt_iface.h b/extensions/xt_iface.h
index 6a7ec0d..46fae34 100644
--- a/extensions/xt_iface.h
+++ b/extensions/xt_iface.h
@@ -16,11 +16,6 @@ enum {
 	XT_IFACE_IFACE       = 1 << 15,
 };
 
-struct xt_iface_flag_pairs {
-	u_int16_t iface_flag;
-	u_int32_t iff_flag;
-};
-
 struct xt_iface_mtinfo {
 	char ifname[IFNAMSIZ];
 	u_int16_t flags;