diff --git a/src/otr/otrlibv4.c b/src/otr/otrlibv4.c
index 3b9b643e..01afa868 100644
--- a/src/otr/otrlibv4.c
+++ b/src/otr/otrlibv4.c
@@ -24,6 +24,8 @@
 #include <libotr/privkey.h>
 #include <libotr/message.h>
 
+#include "ui/ui.h"
+
 OtrlPolicy
 otrlib_policy(void)
 {