diff -Nurp guitarix-0.28.2.orig/src/LV2/gx_amp.lv2/gxamp_gui.cpp guitarix-0.28.2.mod/src/LV2/gx_amp.lv2/gxamp_gui.cpp
--- guitarix-0.28.2.orig/src/LV2/gx_amp.lv2/gxamp_gui.cpp	2013-08-03 11:23:01.000000000 +0200
+++ guitarix-0.28.2.mod/src/LV2/gx_amp.lv2/gxamp_gui.cpp	2013-10-04 03:38:26.927527576 +0200
@@ -124,19 +124,12 @@ void GXPluginGUI::set_skin()
   gtk_rc_parse_string (toparse.c_str());
 }
 
-inline std::string to_string(long long _Val)
-{   // convert int to string
-        char _Buf[128];
-        sprintf(_Buf, "%lld", _Val);
-        return (std::string(_Buf));
-}
-
 void GXPluginGUI::set_plug_name()
 {
   // Here the plugin should have different name for different amp.....
   addKnob = "";
   plugskin = "amp21.png";
-  plug_name = "GUITARIXLV2" + to_string(reinterpret_cast<long long>(this));
+  plug_name = "GUITARIXLV2" + std::to_string(reinterpret_cast<long long>(this));
   //fprintf(stderr,"%s",plug_name.c_str());
 }
 
diff -Nurp guitarix-0.28.2.orig/src/LV2/gx_amp_stereo.lv2/gxamp_stereo_gui.cpp guitarix-0.28.2.mod/src/LV2/gx_amp_stereo.lv2/gxamp_stereo_gui.cpp
--- guitarix-0.28.2.orig/src/LV2/gx_amp_stereo.lv2/gxamp_stereo_gui.cpp	2013-08-03 11:23:01.000000000 +0200
+++ guitarix-0.28.2.mod/src/LV2/gx_amp_stereo.lv2/gxamp_stereo_gui.cpp	2013-10-04 03:39:12.223528009 +0200
@@ -124,18 +124,11 @@ void GXPluginGUI::set_skin()
   gtk_rc_parse_string (toparse.c_str());
 }
 
-inline std::string to_string(long long _Val)
-{   // convert int to string
-        char _Buf[128];
-        sprintf(_Buf, "%lld", _Val);
-        return (std::string(_Buf));
-}
-
 void GXPluginGUI::set_plug_name()
 {
   addKnob = "";
   plugskin = "amp21.png";
-  plug_name = "GUITARIXLV2" + to_string(reinterpret_cast<long long>(this));
+  plug_name = "GUITARIXLV2" + std::to_string(reinterpret_cast<long long>(this));
 }
 
 GtkWidget* GXPluginGUI::make_gui()