diff --git a/sub_cc.h b/sub_cc.h
index 8c808a6e5d..d6be74fd14 100644
--- a/sub_cc.h
+++ b/sub_cc.h
@@ -1,6 +1,7 @@
 #ifndef SUB_CC_H
 #define SUB_CC_H
 
+extern int subcc_enabled;
 void subcc_process_data(unsigned char *inputdata,unsigned int len);
 
 #endif /*SUB_CC_H*/