diff --git a/src/libinput.h b/src/libinput.h
index fdb755d3..784e81a4 100644
--- a/src/libinput.h
+++ b/src/libinput.h
@@ -184,6 +184,7 @@ struct libinput_interface {
 
 struct libinput;
 struct libinput_device;
+struct libinput_seat;
 
 /*
  * Base