diff --git a/spectrum/src/spectrumconversation.h b/spectrum/src/spectrumconversation.h
index 4fe8fc0d5e61aa96a292b26702633f8d452a103f..697019e6065a719002bf17533577c95c59e54e17 100644
--- a/spectrum/src/spectrumconversation.h
+++ b/spectrum/src/spectrumconversation.h
@@ -27,6 +27,7 @@
 #include <algorithm>
 #include "transport/abstractconversation.h"
 #include "transport/conversationmanager.h"
+#include "transport/user.h"
 
 using namespace Transport;