diff --git a/sound/pci/oxygen/xonar_dg.c b/sound/pci/oxygen/xonar_dg.c
index cc610ac1fc191..dd45cf4d9eb9a 100644
--- a/sound/pci/oxygen/xonar_dg.c
+++ b/sound/pci/oxygen/xonar_dg.c
@@ -40,6 +40,7 @@
  */
 
 #include <linux/pci.h>
+#include <linux/delay.h>
 #include <sound/control.h>
 #include <sound/core.h>
 #include <sound/info.h>