diff --git a/src/plugins/mod_ucmd.c b/src/plugins/mod_ucmd.c
index ca616cb..075372e 100644
--- a/src/plugins/mod_ucmd.c
+++ b/src/plugins/mod_ucmd.c
@@ -483,6 +483,13 @@ int parse_config(struct plugin_handle* plugin, const char* config)
 int plugin_register(struct plugin_handle *plugin, const char *config){
 	PLUGIN_INITIALIZE(plugin, "User command plugin", "0.1", "Provide custom commands to users.");
 
+	/* Need version 2 or later of the plugin API. */
+	if(plugin->plugin_api_version < 2)
+	{
+		plugin->error_msg = "UCMD support requires version 2 or later of the plugin API";
+		return -1;
+	}
+
 	/* Attempt to parse the config we were given. */
 	if(parse_config(plugin, config) == -1) return -1;