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--- a/libupnpp/control/discovery.cxx
+++ b/libupnpp/control/discovery.cxx
@@ -14,7 +14,7 @@
  *       Free Software Foundation, Inc.,
  *       59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
-//#include "config.h"
+#include "config.h"
 
 #include "discovery.hxx"