diff --git a/backends/libyahoo2/main.cpp b/backends/libyahoo2/main.cpp
index c6e2c6b4d1eab4edede3195c907891f4a4f24f68..eda158b017a00af7cce98fee2af3b31c136685ef 100644
--- a/backends/libyahoo2/main.cpp
+++ b/backends/libyahoo2/main.cpp
@@ -16,6 +16,7 @@
 
 // Swiften
 #include "Swiften/Swiften.h"
+#include "Swiften/Network/TLSConnectionFactory.h"
 #include "Swiften/TLS/OpenSSL/OpenSSLContextFactory.h"
 
 // for signal handler