diff --git a/src/newgrf_config.h b/src/newgrf_config.h
--- a/src/newgrf_config.h
+++ b/src/newgrf_config.h
@@ -205,7 +205,7 @@ char *GRFBuildParamList(char *dst, const
 void ShowNewGRFSettings(bool editable, bool show_params, bool exec_changes, GRFConfig **config);
 
 #ifdef ENABLE_NETWORK
-/* For communication about GRFs over the network */
+/** For communication about GRFs over the network */
 #define UNKNOWN_GRF_NAME_PLACEHOLDER "<Unknown>"
 GRFTextWrapper *FindUnknownGRFName(uint32 grfid, uint8 *md5sum, bool create);
 #endif /* ENABLE_NETWORK */