diff --git a/include/libweston/libweston.h b/include/libweston/libweston.h
index 6321d8da..1775b590 100644
--- a/include/libweston/libweston.h
+++ b/include/libweston/libweston.h
@@ -695,9 +695,6 @@ weston_touch_send_motion(struct weston_touch *touch,
 void
 weston_touch_send_frame(struct weston_touch *touch);
 
-int
-wl_data_device_manager_init(struct wl_display *display);
-
 
 void
 weston_seat_set_selection(struct weston_seat *seat,
diff --git a/libweston/libweston-internal.h b/libweston/libweston-internal.h
index 5cbe8190..69b3e2ec 100644
--- a/libweston/libweston-internal.h
+++ b/libweston/libweston-internal.h
@@ -316,4 +316,8 @@ void
 weston_protected_surface_send_event(struct protected_surface *psurface,
 				    enum weston_hdcp_protection protection);
 
+/* others */
+int
+wl_data_device_manager_init(struct wl_display *display);
+
 #endif