diff --git a/src/otr/otrlibv3.c b/src/otr/otrlibv3.c
index 8343f19f..c32bd239 100644
--- a/src/otr/otrlibv3.c
+++ b/src/otr/otrlibv3.c
@@ -36,6 +36,7 @@
 #include <libotr/message.h>
 
 #include "ui/ui.h"
+#include "window_list.h"
 #include "otr/otr.h"
 #include "otr/otrlib.h"