diff --git a/io/iob_send.c b/io/iob_send.c
index bf059c9..dd6b060 100644
--- a/io/iob_send.c
+++ b/io/iob_send.c
@@ -4,7 +4,7 @@
 #include <errno.h>
 #include <netinet/in.h>
 #include <netinet/tcp.h>
-#ifdef __linux__
+#if defined(__linux__) || defined(__FreeBSD__)
 #include <alloca.h>
 #endif