diff --git a/engines/engineinterface.h b/engines/engineinterface.h
index fd77ca29..080e301e 100644
--- a/engines/engineinterface.h
+++ b/engines/engineinterface.h
@@ -1,7 +1,9 @@
 #ifndef __engineinterface_h
 #define __engineinterface_h
 
-#include "../kernel/frame.h"
+#include "kernel/frame.h"
+#include "kernel/geom.h"
+#include <X11/Xlib.h>
 #include <glib.h>
 
 /* startup */
@@ -48,4 +50,10 @@ typedef void EngineFrameHide(Frame *self);
 /* get_context */
 typedef Context EngineGetContext(Client *client, Window win);
 
+typedef void EngineRenderLabel(Window win, Rect *area, char *text,
+                               gboolean hilight, gboolean toplevel);
+
+typedef void EngineSizeLabel(char *text, gboolean hilight, gboolean toplevel,
+                             Size *s);
+
 #endif