Index: uspace/lib/nic/include/nic_addr_db.h
===================================================================
--- uspace/lib/nic/include/nic_addr_db.h	(revision 16bfcd3dd8e60cc153482fb448ef8388600e599b)
+++ uspace/lib/nic/include/nic_addr_db.h	(revision a1026daf544b91d3c8e6d81817113aece3c7440e)
@@ -60,5 +60,5 @@
 extern int nic_addr_db_insert(nic_addr_db_t *db, const uint8_t *addr);
 extern int nic_addr_db_remove(nic_addr_db_t *db, const uint8_t *addr);
-extern int nic_addr_db_contains(const nic_addr_db_t *db, const uint8_t *addr);
+extern bool nic_addr_db_contains(const nic_addr_db_t *db, const uint8_t *addr);
 extern void nic_addr_db_foreach(const nic_addr_db_t *db,
 	void (*func)(const uint8_t *, void *), void *arg);
Index: uspace/lib/nic/include/nic_rx_control.h
===================================================================
--- uspace/lib/nic/include/nic_rx_control.h	(revision 16bfcd3dd8e60cc153482fb448ef8388600e599b)
+++ uspace/lib/nic/include/nic_rx_control.h	(revision a1026daf544b91d3c8e6d81817113aece3c7440e)
@@ -118,5 +118,5 @@
 extern int nic_rxc_set_addr(nic_rxc_t *rxc,
 	const nic_address_t *prev_addr, const nic_address_t *curr_addr);
-extern int nic_rxc_check(const nic_rxc_t *rxc,
+extern bool nic_rxc_check(const nic_rxc_t *rxc,
 	const void *data, size_t size, nic_frame_type_t *frame_type);
 extern void nic_rxc_hw_filtering(nic_rxc_t *rxc,