diff --git a/util-linux/mount.c b/util-linux/mount.c
index 0bc46ec..b059d70 100644
--- a/util-linux/mount.c
+++ b/util-linux/mount.c
@@ -345,7 +345,7 @@
 			if (strcmp(blockDevice, "rootfs") == 0) {
 				continue;
 			} else if (strcmp(blockDevice, "/dev/root") == 0) {
-				blockDevice = find_real_root_device_name(blockDevice);
+				blockDevice = find_real_root_device_name();
 			}
 			if (!onlytype || (strcmp(m->mnt_type, onlytype) == 0)) {
 				printf("%s on %s type %s (%s)\n", blockDevice, m->mnt_dir,
diff --git a/util-linux/umount.c b/util-linux/umount.c
index 37a8f06..21c2e6e 100644
--- a/util-linux/umount.c
+++ b/util-linux/umount.c
@@ -115,7 +115,7 @@
 				} else if (strcmp(cur->device, "/dev/root") == 0) {
 					/* Adjusts device to be the real root device,
 					 * or leaves device alone if it can't find it */
-					cur->device = find_real_root_device_name(cur->device);
+					cur->device = find_real_root_device_name();
 				}
 #endif
 				return cur->device;