diff --git a/File.cpp b/File.cpp
index e4caa25..1d5e6f5 100644
--- a/File.cpp
+++ b/File.cpp
@@ -9,11 +9,11 @@
 
 namespace coreutils {
 
-   File::File(std::string fileName, int mode, int authority) {
-      open(fileName, mode, authority);
-   }
+//   File::File(std::string fileName, int mode, int authority) {
+//      open(fileName, mode, authority);
+//   }
 
-   File::File(coreutils::ZString &fileName, int mode, int authority) {
+   File::File(coreutils::ZString fileName, int mode, int authority) {
       open(fileName.str(), mode, authority);
    }
 
diff --git a/File.h b/File.h
index 73f5e2f..09d2db3 100644
--- a/File.h
+++ b/File.h
@@ -16,8 +16,8 @@ namespace coreutils {
    class File {
 
     public:
-      File(std::string fileName, int mode, int authority);
-      File(ZString &fileName, int mode = O_RDONLY, int authority = 0664);
+//      File(std::string fileName, int mode, int authority);
+      File(ZString fileName, int mode = O_RDONLY, int authority = 0664);
       ~File();
       void setBufferSize(size_t size);
       int read();