diff --git a/lib/ansible/modules/web_infrastructure/letsencrypt.py b/lib/ansible/modules/web_infrastructure/letsencrypt.py
index e12194da932..6f57ccd40fa 100644
--- a/lib/ansible/modules/web_infrastructure/letsencrypt.py
+++ b/lib/ansible/modules/web_infrastructure/letsencrypt.py
@@ -536,7 +536,7 @@ class ACMEClient(object):
         _, out, _ = self.module.run_command(openssl_csr_cmd, check_rc=True)
 
         domains = set([])
-        common_name = re.search(r"Subject:.*? CN=([^\s,;/]+)", out.decode('utf8'))
+        common_name = re.search(r"Subject:.*? CN\s?=\s?([^\s,;/]+)", out.decode('utf8'))
         if common_name is not None:
             domains.add(common_name.group(1))
         subject_alt_names = re.search(r"X509v3 Subject Alternative Name: \n +([^\n]+)\n", out.decode('utf8'), re.MULTILINE | re.DOTALL)