diff --git a/src/Pieces/PiecesFiles.cpp b/src/Pieces/PiecesFiles.cpp
index 26617f8..da491d4 100644
--- a/src/Pieces/PiecesFiles.cpp
+++ b/src/Pieces/PiecesFiles.cpp
@@ -151,6 +151,6 @@ bool PiecesFiles::getFilePath(int polyominoSize, std::string& filePath) const {
         return false;
     }
 
-    filePath = dataFolderPath / (std::to_string(polyominoSize) + "minos.bin");
+    filePath = (dataFolderPath / (std::to_string(polyominoSize) + "minos.bin")).string();
     return true;
 }