diff --git a/arch/x86_64/bits/stat.h b/arch/x86_64/bits/stat.h
index 21457961..081237c3 100644
--- a/arch/x86_64/bits/stat.h
+++ b/arch/x86_64/bits/stat.h
@@ -2,7 +2,7 @@
  * by the corresponding correctly-sized userspace types. */
 
 struct stat {
-	unsigned long st_dev;
+	dev_t st_dev;
 	ino_t st_ino;
 	nlink_t st_nlink;