diff --git a/sys/dev/fb/fbd.c b/sys/dev/fb/fbd.c
index b75ca33516c4..66d0e8dea499 100644
--- a/sys/dev/fb/fbd.c
+++ b/sys/dev/fb/fbd.c
@@ -246,7 +246,7 @@ fb_probe(struct fb_info *info)
 		return (ENXIO);
 
 	if (info->fb_write != NULL) {
-		if (info->fb_write == NULL) {
+		if (info->fb_read == NULL) {
 			return (EINVAL);
 		}
 		info->fb_flags |= FB_FLAG_NOMMAP;