diff --git a/lib/kafs/afssysdefs.h b/lib/kafs/afssysdefs.h
index a5de6fde8..3ace4b5e7 100644
--- a/lib/kafs/afssysdefs.h
+++ b/lib/kafs/afssysdefs.h
@@ -79,7 +79,7 @@
 #define AFS_SYSCALL	31
 #endif
 
-#if defined(__NetBSD__)
+#if defined(__NetBSD__) || defined(__OpenBSD__)
 #define AFS_SYSCALL 210
 #endif