diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index a4eee32..84e6a7e 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -1000,6 +1000,8 @@
 		return -ENODEV;
 
 	if (!data.hd_address || !data.hd_nirqs) {
+		if (data.hd_address)
+			iounmap(data.hd_address);
 		printk("%s: no address or irqs in _CRS\n", __func__);
 		return -ENODEV;
 	}