diff --git a/src/protocol/file/dgi.h b/src/protocol/file/dgi.h
index 33f7d9d6..bed4a3da 100644
--- a/src/protocol/file/dgi.h
+++ b/src/protocol/file/dgi.h
@@ -11,9 +11,14 @@ extern "C" {
 struct connection;
 struct module;
 
+#ifdef CONFIG_DGI
 extern struct module dgi_protocol_module;
 extern protocol_handler_T dgi_protocol_handler;
 int execute_dgi(struct connection *);
+#else
+#define dgi_protocol_handler NULL
+#endif
+
 
 #ifdef __cplusplus
 }