diff --git a/sound/pci/hda/hda_hwdep.c b/sound/pci/hda/hda_hwdep.c
index 64be7b533488..bafb7b01f5a1 100644
--- a/sound/pci/hda/hda_hwdep.c
+++ b/sound/pci/hda/hda_hwdep.c
@@ -83,7 +83,7 @@ static int hda_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
 static int hda_hwdep_ioctl_compat(struct snd_hwdep *hw, struct file *file,
 				  unsigned int cmd, unsigned long arg)
 {
-	return hda_hwdep_ioctl(hw, file, cmd, compat_ptr(arg));
+	return hda_hwdep_ioctl(hw, file, cmd, (unsigned long)compat_ptr(arg));
 }
 #endif