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 daccb64f..a03971be 100644
--- a/plugins/modules/docker_plugin.py
+++ b/plugins/modules/docker_plugin.py
@@ -228,7 +228,7 @@ class DockerPluginManager(object):
             if not settings:
                 differences.add(
                     "plugin_options",
-                    parameters=self.parameters.plugin_options,
+                    parameter=self.parameters.plugin_options,
                     active=settings,
                 )
             else: