Index: uspace/lib/nettl/include/nettl/amap.h
===================================================================
--- uspace/lib/nettl/include/nettl/amap.h	(revision 8d48c7e46fe4c12afd9489154fb06b10f9e2c913)
+++ uspace/lib/nettl/include/nettl/amap.h	(revision e211ea04fccf33d4cb2092f630a29e893e096a02)
@@ -91,10 +91,10 @@
 } amap_flags_t;
 
-extern int amap_create(amap_t **);
+extern errno_t amap_create(amap_t **);
 extern void amap_destroy(amap_t *);
-extern int amap_insert(amap_t *, inet_ep2_t *, void *, amap_flags_t,
+extern errno_t amap_insert(amap_t *, inet_ep2_t *, void *, amap_flags_t,
     inet_ep2_t *);
 extern void amap_remove(amap_t *, inet_ep2_t *);
-extern int amap_find_match(amap_t *, inet_ep2_t *, void **);
+extern errno_t amap_find_match(amap_t *, inet_ep2_t *, void **);
 
 #endif
Index: uspace/lib/nettl/include/nettl/portrng.h
===================================================================
--- uspace/lib/nettl/include/nettl/portrng.h	(revision 8d48c7e46fe4c12afd9489154fb06b10f9e2c913)
+++ uspace/lib/nettl/include/nettl/portrng.h	(revision e211ea04fccf33d4cb2092f630a29e893e096a02)
@@ -58,9 +58,9 @@
 } portrng_flags_t;
 
-extern int portrng_create(portrng_t **);
+extern errno_t portrng_create(portrng_t **);
 extern void portrng_destroy(portrng_t *);
-extern int portrng_alloc(portrng_t *, uint16_t, void *,
+extern errno_t portrng_alloc(portrng_t *, uint16_t, void *,
     portrng_flags_t, uint16_t *);
-extern int portrng_find_port(portrng_t *, uint16_t, void **);
+extern errno_t portrng_find_port(portrng_t *, uint16_t, void **);
 extern void portrng_free_port(portrng_t *, uint16_t);
 extern bool portrng_empty(portrng_t *);