diff --git a/nest/rt-attr.c b/nest/rt-attr.c
index 8259877c..cccae2f6 100644
--- a/nest/rt-attr.c
+++ b/nest/rt-attr.c
@@ -44,7 +44,9 @@
  * Routing tables always contain only cached &rta's.
  */
 
+#ifdef HAVE_ALLOCA_H
 #include <alloca.h>
+#endif
 
 #include "nest/bird.h"
 #include "nest/route.h"
diff --git a/nest/rt-table.c b/nest/rt-table.c
index 06236b64..db70b666 100644
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@ -42,7 +42,9 @@
 #include "filter/filter.h"
 #include "lib/string.h"
 
+#ifdef HAVE_ALLOCA_H
 #include <alloca.h>
+#endif
 
 static slab *rte_slab;
 static linpool *rte_update_pool;