diff --git a/src/conference/session/port-config.h b/src/conference/session/port-config.h
index 44da9a6bb..1bebccf13 100644
--- a/src/conference/session/port-config.h
+++ b/src/conference/session/port-config.h
@@ -22,6 +22,8 @@
 
 #include <string>
 
+#include "linphone/utils/general.h"
+
 // =============================================================================
 
 LINPHONE_BEGIN_NAMESPACE