diff --git a/changelogs/fragments/55745-azure_rm_common.yaml b/changelogs/fragments/55745-azure_rm_common.yaml
new file mode 100644
index 00000000000..fe94de38266
--- /dev/null
+++ b/changelogs/fragments/55745-azure_rm_common.yaml
@@ -0,0 +1,2 @@
+bugfixes:
+  - Fix cannot get credential when `source_auth` set to `credential_file`.
diff --git a/lib/ansible/module_utils/azure_rm_common.py b/lib/ansible/module_utils/azure_rm_common.py
index 0115e31c699..530c0f1b864 100644
--- a/lib/ansible/module_utils/azure_rm_common.py
+++ b/lib/ansible/module_utils/azure_rm_common.py
@@ -1226,7 +1226,7 @@ class AzureRMAuth(object):
 
         if auth_source == 'credential_file':
             self.log("Retrieving credentials from credential file")
-            profile = params.get('profile', 'default')
+            profile = params.get('profile') or 'default'
             default_credentials = self._get_profile(profile)
             return default_credentials