diff --git a/lib/libcoolstream/playback_cs.h b/lib/libcoolstream/playback_cs.h
index 5a5c61fb6..0a8359389 100644
--- a/lib/libcoolstream/playback_cs.h
+++ b/lib/libcoolstream/playback_cs.h
@@ -29,6 +29,8 @@ typedef struct {
 	std::string codec_name;
 } playback_audio_pid_info_t;
 
+#define MAX_PLAYBACK_PIDS 40
+
 class cPlayback {
 private:
 	cPlaybackData * pd;
diff --git a/lib/libcoolstream2/playback_cs.h b/lib/libcoolstream2/playback_cs.h
index 1f7ded7bd..04dc7b45a 100644
--- a/lib/libcoolstream2/playback_cs.h
+++ b/lib/libcoolstream2/playback_cs.h
@@ -30,6 +30,8 @@ typedef struct {
 	std::string codec_name;
 } playback_audio_pid_info_t;
 
+#define MAX_PLAYBACK_PIDS 40
+
 class cPlayback {
 private:
 	cPlaybackData * pd;