diff --git a/module_usb_aud_shared/pll/pll.h b/module_usb_aud_shared/pll/pll.h
index d79ca14f..af761d72 100644
--- a/module_usb_aud_shared/pll/pll.h
+++ b/module_usb_aud_shared/pll/pll.h
@@ -1,4 +1,4 @@
-void PllInit(void);
+void PllInit(chanend ?c);
 
 
-void PllMult(unsigned mult);
+void PllMult(unsigned mult, chanend ?c);