diff --git a/cpu/native/include/nativenet.h b/cpu/native/include/nativenet.h
index 3d91466ad0..c19c750005 100644
--- a/cpu/native/include/nativenet.h
+++ b/cpu/native/include/nativenet.h
@@ -1,3 +1,6 @@
+#ifndef NATIVENET_H
+#define NATIVENET_H
+
 #include <net/ethernet.h>
 
 #define RX_BUF_SIZE (10)
@@ -27,3 +30,4 @@ uint16_t nativenet_set_pan(uint16_t pan);
 uint16_t nativenet_get_pan();
 
 void nativenet_switch_to_rx();
+#endif /* NATIVENET_H */
diff --git a/cpu/native/include/nativenet_internal.h b/cpu/native/include/nativenet_internal.h
index a20c33c8b7..2a2c01a7dc 100644
--- a/cpu/native/include/nativenet_internal.h
+++ b/cpu/native/include/nativenet_internal.h
@@ -1,3 +1,6 @@
+#ifndef NATIVENET_INTERNAL_H
+#define NATIVENET_INTERNAL_H
+
 #include "tap.h"
 
 #define NNEV_PWRDWN     0x01
@@ -22,3 +25,4 @@ extern struct rx_buffer_s _nativenet_rx_buffer[];
 extern volatile uint8_t rx_buffer_next;
 
 void _nativenet_handle_packet(radio_packet_t *packet);
+#endif /* NATIVENET_INTERNAL_H */