diff --git a/changelogs/fragments/1146-fix.yml b/changelogs/fragments/1146-fix.yml
new file mode 100644
index 00000000..1c9540c9
--- /dev/null
+++ b/changelogs/fragments/1146-fix.yml
@@ -0,0 +1,2 @@
+bugfixes:
+  - "docker_plugin - fix diff mode for plugin options (https://github.com/ansible-collections/community.docker/pull/1146)."
diff --git a/plugins/modules/docker_plugin.py b/plugins/modules/docker_plugin.py
index e7242e8e..c655570b 100644
--- a/plugins/modules/docker_plugin.py
+++ b/plugins/modules/docker_plugin.py
@@ -218,7 +218,7 @@ class DockerPluginManager(object):
         if self.parameters.plugin_options:
             settings = self.existing_plugin.get('Settings')
             if not settings:
-                differences.add('plugin_options', parameters=self.parameters.plugin_options, active=settings)
+                differences.add('plugin_options', parameter=self.parameters.plugin_options, active=settings)
             else:
                 existing_options = parse_options(settings.get('Env'))