diff --git a/plugins/dell/fu-plugin-dell.c b/plugins/dell/fu-plugin-dell.c
index 3d6cc1915..41261152e 100644
--- a/plugins/dell/fu-plugin-dell.c
+++ b/plugins/dell/fu-plugin-dell.c
@@ -427,7 +427,7 @@ fu_plugin_dell_toggle_dock_mode (FuPlugin *plugin,
 	return TRUE;
 }
 
-gboolean
+static gboolean
 fu_plugin_dell_toggle_host_mode (const efi_guid_t guid, int mode)
 {
 	gint ret;