$OpenBSD$
--- src/od-generic/memory.c.orig	Sat May 21 05:41:06 2011
+++ src/od-generic/memory.c	Sat May 21 05:42:28 2011
@@ -27,7 +27,7 @@
 #define IPC_STAT    0x08
 
 #if !defined(__FreeBSD__)
-typedef int key_t;
+/* typedef int key_t; */
 #endif
 
 /* One shmid data structure for each shared memory segment in the system. */