diff --git a/src/slic3r/GUI/DeviceManager.cpp b/src/slic3r/GUI/DeviceManager.cpp
index abb8ca0e8..894835a69 100644
--- a/src/slic3r/GUI/DeviceManager.cpp
+++ b/src/slic3r/GUI/DeviceManager.cpp
@@ -5056,7 +5056,7 @@ json DeviceManager::filaments_blacklist = json::object();
 std::string DeviceManager::get_string_from_config(std::string type_str, std::string item)
 {
     std::string config_file = Slic3r::resources_dir() + "/printers/" + type_str + ".json";
-    std::ifstream json_file(config_file.c_str());
+    boost::nowide::ifstream json_file(config_file.c_str());
     try {
         json jj;
         if (json_file.is_open()) {
diff --git a/src/slic3r/Utils/json_diff.cpp b/src/slic3r/Utils/json_diff.cpp
index a1e3609f1..a4f4bbcce 100644
--- a/src/slic3r/Utils/json_diff.cpp
+++ b/src/slic3r/Utils/json_diff.cpp
@@ -83,7 +83,7 @@ bool json_diff::load_compatible_settings(std::string const &type, std::string co
     printer_version = version2;
     settings_base.clear();
     std::string config_file = Slic3r::resources_dir() + "/printers/" + type2 + ".json";
-    std::ifstream json_file(config_file.c_str());
+    boost::nowide::ifstream json_file(config_file.c_str());
     try {
         json versions;
         if (json_file.is_open()) {