diff --git a/src/serial.cc b/src/serial.cc
index 7b2d2a4..aab4caa 100755
--- a/src/serial.cc
+++ b/src/serial.cc
@@ -1,7 +1,7 @@
 /* Copyright 2012 William Woodall and John Harrison */
 #include <algorithm>
 
-#if !defined(_WIN32) && !defined(__OpenBSD__)
+#if !defined(_WIN32) && !defined(__OpenBSD__) && !defined(__FreeBSD__)
 # include <alloca.h>
 #endif