diff --git a/xf86drm.c b/xf86drm.c
index 65764de..a889d48 100644
--- a/xf86drm.c
+++ b/xf86drm.c
@@ -2887,6 +2887,8 @@
         return DRM_BUS_PCI;
 
     return -EINVAL;
+#elif defined(__OpenBSD__)
+	return DRM_BUS_PCI;
 #else
 #warning "Missing implementation of drmParseSubsystemType"
     return -EINVAL;