diff --git a/stream/stream.h b/stream/stream.h
index c89e494099..24a587a110 100644
--- a/stream/stream.h
+++ b/stream/stream.h
@@ -54,6 +54,7 @@
 #define STREAM_CTRL_GET_TIME_LENGTH 1
 #define STREAM_CTRL_SEEK_TO_CHAPTER 2
 #define STREAM_CTRL_GET_CURRENT_CHAPTER 3
+#define STREAM_CTRL_GET_NUM_CHAPTERS 4
 
 #ifdef MPLAYER_NETWORK
 #include "network.h"