diff --git a/src/pcsc.hxx b/src/pcsc.hxx
index b6ebf58..6434c6e 100644
--- a/src/pcsc.hxx
+++ b/src/pcsc.hxx
@@ -536,8 +536,7 @@ namespace pcsc {
 
       //! @c false if last operation was not successful
       operator bool() const {
-        //return (_state>>30&3)==0;
-        return _state==SCARD_S_SUCCESS;
+        return (_state>>30&3)==0;
       }
 
       //! Get the describing text of the last error