diff --git a/sbin/sysctl/sysctl.c b/sbin/sysctl/sysctl.c
index fb7c3058594..1c498568a53 100644
--- a/sbin/sysctl/sysctl.c
+++ b/sbin/sysctl/sysctl.c
@@ -270,8 +270,14 @@ T_dev_t(int l2, void *p)
 	dev_t *d = (dev_t *)p;
 	if (l2 != sizeof *d)
 		err(1, "T_dev_T %d != %d", l2, sizeof *d);
-	printf("{ major = %d, minor = %d }",
-		major(*d), minor(*d));
+	if ((int)(*d) != -1) {
+		if (minor(*d) > 255 || minor(*d) < 0)
+			printf("{ major = %d, minor = 0x%x }",
+				major(*d), minor(*d));
+		else
+			printf("{ major = %d, minor = %d }",
+				major(*d), minor(*d));
+	}
 	return (0);
 }