1 files changed, 3 insertions, 0 deletions

diff --git a/include/sound/ac97_codec.h b/include/sound/ac97_codec.h
index 9b1c0985480c..3dae3f799b9b 100644
--- a/include/sound/ac97_codec.h
+++ b/include/sound/ac97_codec.h
@@ -32,6 +32,9 @@
 #include "control.h"
 #include "info.h"
 
+/* maximum number of devices on the AC97 bus */
+#define AC97_BUS_MAX_DEVICES    4
+
 /*
  *  AC'97 codec registers
  */