--- ./src/Fl_Native_File_Chooser_GTK.cxx	2015-12-13 15:56:09.000000000 +0530
+++ ../Fl_Native_File_Chooser_GTK.cxx	2017-04-30 12:20:01.391541825 +0530
@@ -684,7 +684,7 @@
     return;
   }
   
-  char *pc_dl_error; // used to report errors by the GET_SYM macro...
+  const char *pc_dl_error; // used to report errors by the GET_SYM macro...
   // items we need from GLib
   GET_SYM(g_free, ptr_glib);
   GET_SYM(g_slist_nth_data, ptr_glib);