diff --git a/Source/kwsys/SystemTools.cxx b/Source/kwsys/SystemTools.cxx
index 2708211..b03e7b0 100644
--- a/Source/kwsys/SystemTools.cxx
+++ b/Source/kwsys/SystemTools.cxx
@@ -2323,20 +2323,24 @@ bool SystemTools::CopyFileAlways(const kwsys_stl::string& source, const kwsys_st
   // incorrect to not check the error condition on the fin.read()
   // before using the data, but the fin.gcount() will be zero if an
   // error occurred.  Therefore, the loop should be safe everywhere.
   while(fin)
     {
     fin.read(buffer, bufferSize);
     if(fin.gcount())
       {
       fout.write(buffer, fin.gcount());
       }
+    else
+      {
+      break;
+      }
     }
 
   // Make sure the operating system has finished writing the file
   // before closing it.  This will ensure the file is finished before
   // the check below.
   fout.flush();
 
   fin.close();
   fout.close();