diff --git a/libfwupdplugin/fu-efivar.h b/libfwupdplugin/fu-efivar.h
index c966c109e..7f639d7ed 100644
--- a/libfwupdplugin/fu-efivar.h
+++ b/libfwupdplugin/fu-efivar.h
@@ -12,6 +12,7 @@
 #define FU_EFIVAR_GUID_EFI_GLOBAL			"8be4df61-93ca-11d2-aa0d-00e098032b8c"
 #define FU_EFIVAR_GUID_FWUPDATE			"0abba7dc-e516-4167-bbf5-4d9d1c739416"
 #define FU_EFIVAR_GUID_UX_CAPSULE			"3b8c8162-188c-46a4-aec9-be43f1d65697"
+#define FU_EFIVAR_GUID_SECURITY_DATABASE		"d719b2cb-3d3a-4596-a3bc-dad00e67656f"
 
 #define FU_EFIVAR_ATTR_NON_VOLATILE			(1 << 0)
 #define FU_EFIVAR_ATTR_BOOTSERVICE_ACCESS		(1 << 1)
diff --git a/plugins/uefi-dbx/fu-plugin-uefi-dbx.c b/plugins/uefi-dbx/fu-plugin-uefi-dbx.c
index 4aed0eb48..9692b957b 100644
--- a/plugins/uefi-dbx/fu-plugin-uefi-dbx.c
+++ b/plugins/uefi-dbx/fu-plugin-uefi-dbx.c
@@ -84,7 +84,7 @@ fu_plugin_add_security_attrs (FuPlugin *plugin, FuSecurityAttrs *attrs)
 	}
 
 	/* get system dbx */
-	if (!fu_efivar_get_data ("d719b2cb-3d3a-4596-a3bc-dad00e67656f", "dbx",
+	if (!fu_efivar_get_data (FU_EFIVAR_GUID_SECURITY_DATABASE, "dbx",
 				 &buf_system, &bufsz, NULL, &error_local)) {
 		g_warning ("failed to load EFI dbx: %s", error_local->message);
 		fwupd_security_attr_set_result (attr, FWUPD_SECURITY_ATTR_RESULT_NOT_VALID);