diff --git a/bundles/sshmon/files/check_mounts b/bundles/sshmon/files/check_mounts
index 43ec850..f387ce4 100644
--- a/bundles/sshmon/files/check_mounts
+++ b/bundles/sshmon/files/check_mounts
@@ -34,7 +34,7 @@ def read_systemd():
 
         mountunit = line.split()[0]
         props = check_output(
-            'systemctl show -p FragmentPath,Options,SourcePath,Type,UnitFileState,Where -- ' + mountunit,
+            "systemctl show -p FragmentPath,Options,SourcePath,Type,UnitFileState,Where -- '{}'".format(mountunit),
             shell=True,
         ).decode('UTF-8')
         for pline in props.splitlines():