diff --git a/src/slic3r/GUI/Field.cpp b/src/slic3r/GUI/Field.cpp
index 81a90cfbd..928a6236e 100644
--- a/src/slic3r/GUI/Field.cpp
+++ b/src/slic3r/GUI/Field.cpp
@@ -188,7 +188,7 @@ void Field::get_value_by_opt_type(wxString& str)
             }
         }
     
-        m_value = str.ToUTF8().data();
+        m_value = std::string(str.ToUTF8().data());
 		break; }
 	default:
 		break;