diff --git a/FileUtils.cpp b/FileUtils.cpp
index f298a96..19d953c 100644
--- a/FileUtils.cpp
+++ b/FileUtils.cpp
@@ -34,7 +34,7 @@ ExistsFile( const string& sFile)
       return false ;
 
   // se è un direttorio
-   if ( dwAttr & FILE_ATTRIBUTE_DIRECTORY)
+   if ( ( dwAttr & FILE_ATTRIBUTE_DIRECTORY) != 0)
       return false ;
 
    return true ;