diff --git a/tests/unittests/test_cmd_pgp.c b/tests/unittests/test_cmd_pgp.c
index b1d0ab52..68d48b0c 100644
--- a/tests/unittests/test_cmd_pgp.c
+++ b/tests/unittests/test_cmd_pgp.c
@@ -9,6 +9,7 @@
 #include "config.h"
 
 #include "command/commands.h"
+#include "xmpp/xmpp.h"
 
 #include "ui/stub_ui.h"