diff --git a/sound/drivers/pcsp/pcsp.c b/sound/drivers/pcsp/pcsp.c
index ac57e87d01bc..d8f96219fd36 100644
--- a/sound/drivers/pcsp/pcsp.c
+++ b/sound/drivers/pcsp/pcsp.c
@@ -12,6 +12,7 @@
 #include <sound/initval.h>
 #include <sound/pcm.h>
 #include <linux/input.h>
+#include <linux/delay.h>
 #include <asm/bitops.h>
 #include "pcsp_input.h"
 #include "pcsp.h"