diff --git a/freebsd/drm_os_freebsd.c b/freebsd/drm_os_freebsd.c
index 890a1ae..2d21b3e 100644
--- a/freebsd/drm_os_freebsd.c
+++ b/freebsd/drm_os_freebsd.c
@@ -267,7 +267,7 @@ drm_fstub_ioctl(struct file *file, u_long cmd, void *data, struct ucred *cred,
 		goto out_release;
 	}
 
-	rv = fops->unlocked_ioctl(file, cmd, (unsigned long)data);
+	rv = -fops->unlocked_ioctl(file, cmd, (unsigned long)data);
 
 	dev_relthread(cdev, ref);
 	return (rv);