diff --git a/src/osd/sdl/sdlsync_ntc.c b/src/osd/sdl/sdlsync_ntc.c
index eda378efd7c..1bcae1cd21b 100644
--- a/src/osd/sdl/sdlsync_ntc.c
+++ b/src/osd/sdl/sdlsync_ntc.c
@@ -20,7 +20,7 @@
 #include <signal.h>
 #endif
 
-#ifdef SDLMAME_NETBSD
+#if defined(SDLMAME_NETBSD) || defined(SDLMAME_OPENBSD)
 /* for SIGKILL */
 #include <signal.h>
 #endif