diff --git a/src/training/unicharset_extractor.cpp b/src/training/unicharset_extractor.cpp
index 1fbb58f0..d865935c 100644
--- a/src/training/unicharset_extractor.cpp
+++ b/src/training/unicharset_extractor.cpp
@@ -66,18 +66,18 @@ static int Main(int argc, char **argv) {
   // Load input files
   for (int arg = 1; arg < argc; ++arg) {
     std::filesystem::path filePath = argv[arg];
-    std::string file_data = tesseract::ReadFile(filePath.u8string());
+    std::string file_data = tesseract::ReadFile(argv[arg]);
     if (file_data.empty()) {
       continue;
     }
     std::vector<std::string> texts;
     if (filePath.extension() == ".box") {
-      tprintf("Extracting unicharset from box file %s\n", filePath.u8string());
+      tprintf("Extracting unicharset from box file %s\n", argv[arg]);
       bool res = ReadMemBoxes(-1, /*skip_blanks*/ true, &file_data[0],
                    /*continue_on_failure*/ false, /*boxes*/ nullptr, &texts,
                    /*box_texts*/ nullptr, /*pages*/ nullptr);
       if (!res) {
-        tprintf("Can not read box data from '%s'\n", filePath.u8string());
+        tprintf("Can not read box data from '%s'\n", argv[arg]);
         return EXIT_FAILURE;
       }
     } else {