diff --git a/nest/password.c b/nest/password.c
index ba5d0e61..9a77e89b 100644
--- a/nest/password.c
+++ b/nest/password.c
@@ -8,6 +8,7 @@
 
 #include "nest/bird.h"
 #include "nest/password.h"
+#include "lib/string.h"
 
 struct password_item *last_password_item = NULL;
 
diff --git a/nest/rt-table.c b/nest/rt-table.c
index d313dbcf..82acea06 100644
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@ -42,6 +42,8 @@
 #include "filter/filter.h"
 #include "lib/string.h"
 
+#include <alloca.h>
+
 static slab *rte_slab;
 static linpool *rte_update_pool;
 
diff --git a/proto/bgp/bgp.c b/proto/bgp/bgp.c
index 72eba1af..f6cbed4c 100644
--- a/proto/bgp/bgp.c
+++ b/proto/bgp/bgp.c
@@ -63,6 +63,7 @@
 #include "conf/conf.h"
 #include "lib/socket.h"
 #include "lib/resource.h"
+#include "lib/string.h"
 
 #include "bgp.h"
 
diff --git a/sysdep/unix/krt.c b/sysdep/unix/krt.c
index e841c0a7..e6481844 100644
--- a/sysdep/unix/krt.c
+++ b/sysdep/unix/krt.c
@@ -48,6 +48,7 @@
 #include "nest/protocol.h"
 #include "lib/timer.h"
 #include "conf/conf.h"
+#include "lib/string.h"
 
 #include "unix.h"
 #include "krt.h"