diff --git a/group_vars/all.yml.sample b/group_vars/all.yml.sample
index 7aae6828e..bdf2864a8 100644
--- a/group_vars/all.yml.sample
+++ b/group_vars/all.yml.sample
@@ -373,7 +373,7 @@ dummy:
 #osd_objectstore: bluestore
 
 # Any device containing these patterns in their path will be excluded.
-#osd_auto_discovery_exclude: ['dm-', 'loop']
+#osd_auto_discovery_exclude: "dm-*|loop*"
 
 # xattrs. by default, 'filestore xattr use omap' is set to 'true' if
 # 'osd_mkfs_type' is set to 'ext4'; otherwise it isn't set. This can
diff --git a/group_vars/rhcs.yml.sample b/group_vars/rhcs.yml.sample
index 75474ac29..b333373c3 100644
--- a/group_vars/rhcs.yml.sample
+++ b/group_vars/rhcs.yml.sample
@@ -373,7 +373,7 @@ ceph_rhcs_version: 3
 #osd_objectstore: bluestore
 
 # Any device containing these patterns in their path will be excluded.
-#osd_auto_discovery_exclude: ['dm-', 'loop']
+#osd_auto_discovery_exclude: "dm-*|loop*"
 
 # xattrs. by default, 'filestore xattr use omap' is set to 'true' if
 # 'osd_mkfs_type' is set to 'ext4'; otherwise it isn't set. This can
diff --git a/roles/ceph-defaults/defaults/main.yml b/roles/ceph-defaults/defaults/main.yml
index e65cbf266..e4f50542a 100644
--- a/roles/ceph-defaults/defaults/main.yml
+++ b/roles/ceph-defaults/defaults/main.yml
@@ -365,7 +365,7 @@ osd_mount_options_xfs: noatime,largeio,inode64,swalloc
 osd_objectstore: bluestore
 
 # Any device containing these patterns in their path will be excluded.
-osd_auto_discovery_exclude: ['dm-', 'loop']
+osd_auto_discovery_exclude: "dm-*|loop*"
 
 # xattrs. by default, 'filestore xattr use omap' is set to 'true' if
 # 'osd_mkfs_type' is set to 'ext4'; otherwise it isn't set. This can
diff --git a/roles/ceph-facts/tasks/facts.yml b/roles/ceph-facts/tasks/facts.yml
index f723f8d2a..b8da62b50 100644
--- a/roles/ceph-facts/tasks/facts.yml
+++ b/roles/ceph-facts/tasks/facts.yml
@@ -193,7 +193,7 @@
     - item.value.sectors != "0"
     - item.value.partitions|count == 0
     - item.value.holders|count == 0
-    - item.key not in osd_auto_discovery_exclude
+    - item.key is not match osd_auto_discovery_exclude
 
 - name: set_fact ceph_uid for debian based system - non container
   set_fact: