$OpenBSD: patch-include_driver_Platform_unix_h,v 1.2 2019/05/04 09:10:11 feinerer Exp $
Index: include/driver/Platform_unix.h
--- include/driver/Platform_unix.h.orig
+++ include/driver/Platform_unix.h
@@ -40,7 +40,7 @@
 #include <string.h>
 #include <stdint.h>
 
-#ifndef OS_DARWIN
+#if !defined(OS_DARWIN) && !defined(OS_OPENBSD)
 # include <malloc.h>
 #endif
 
