diff --git a/lib/socket.h b/lib/socket.h
index d3fd7450..82b5de0c 100644
--- a/lib/socket.h
+++ b/lib/socket.h
@@ -9,6 +9,8 @@
 #ifndef _BIRD_SOCKET_H_
 #define _BIRD_SOCKET_H_
 
+#include <errno.h>
+
 #include "lib/resource.h"
 
 typedef struct birdsock {
diff --git a/proto/bgp/bgp.c b/proto/bgp/bgp.c
index f4cb112a..be841bdf 100644
--- a/proto/bgp/bgp.c
+++ b/proto/bgp/bgp.c
@@ -55,8 +55,6 @@
 
 #undef LOCAL_DEBUG
 
-#include <errno.h>
-
 #include "nest/bird.h"
 #include "nest/iface.h"
 #include "nest/protocol.h"