--- src/osd/sdl/sdlsync_ntc.c.orig	Thu Jun  2 11:47:12 2011
+++ src/osd/sdl/sdlsync_ntc.c	Thu Jun  2 11:47:36 2011
@@ -20,7 +20,7 @@
 #include <signal.h>
 #endif
 
-#ifdef SDLMAME_NETBSD
+#if defined(SDLMAME_NETBSD) || defined(SDLMAME_OPENBSD)
 /* for SIGKILL */
 #include <signal.h>
 #endif