connect(main_ui_->welcomePage, SIGNAL(captureFilterSyntaxChanged(bool)),
this, SLOT(captureFilterSyntaxChanged(bool)));
-#if HAVE_EXTCAP
+#ifdef HAVE_EXTCAP
connect(this->main_welcome_, SIGNAL(showExtcapOptions(QString&)),
this, SLOT(showExtcapOptionsDialog(QString&)));
#endif