diff --git a/drivers/isdn/pcbit/pcbit.h b/drivers/isdn/pcbit/pcbit.h
index 388bace..19c18e8 100644
--- a/drivers/isdn/pcbit/pcbit.h
+++ b/drivers/isdn/pcbit/pcbit.h
@@ -166,4 +166,6 @@
 #define L2_RUNNING  5
 #define L2_ERROR    6
 
+extern void pcbit_deliver(struct work_struct *work);
+
 #endif