Index: src/gba/GBALink.cpp
--- src/gba/GBALink.cpp.orig
+++ src/gba/GBALink.cpp
@@ -4,7 +4,7 @@
 #include <string.h>
 
 // malloc.h does not seem to exist on Mac OS 10.7 and is an error on FreeBSD
-#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__)
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
 #include <stdlib.h>
 #else
 #include <malloc.h>