diff --git a/src/ceph-volume/ceph_volume/devices/lvm/zap.py b/src/ceph-volume/ceph_volume/devices/lvm/zap.py
index e5d1ebcc6e7..1d43b5a1dbd 100644
--- a/src/ceph-volume/ceph_volume/devices/lvm/zap.py
+++ b/src/ceph-volume/ceph_volume/devices/lvm/zap.py
@@ -58,7 +58,7 @@ class Zap(object):
             path = device
 
         logger.info("Zapping: %s", path)
-        terminal.write("Zapping: %s", path)
+        terminal.write("Zapping: %s" % path)
 
         wipefs(path)
         zap_data(path)