diff --git a/sesman/chansrv/chansrv_common.h b/sesman/chansrv/chansrv_common.h
index 833e3359..d15c8da7 100644
--- a/sesman/chansrv/chansrv_common.h
+++ b/sesman/chansrv/chansrv_common.h
@@ -20,6 +20,7 @@
 #define _CHANSRV_COMMON_H
 
 #include "parse.h"
+#include "os_calls.h"
 
 int read_entire_packet(struct stream *src, struct stream **dest, int chan_flags, int length, int total_length);
 
diff --git a/sesman/chansrv/sound.c b/sesman/chansrv/sound.c
index 9943a15b..6281969b 100644
--- a/sesman/chansrv/sound.c
+++ b/sesman/chansrv/sound.c
@@ -28,6 +28,7 @@
 #include "defines.h"
 #include "fifo.h"
 #include "file_loc.h"
+#include "chansrv_common.h"
 
 extern int g_rdpsnd_chan_id;    /* in chansrv.c */
 extern int g_display_num;       /* in chansrv.c */