diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 7d076d9..10d2ca0 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -143,7 +143,6 @@
 header-y += sockios.h
 header-y += som.h
 header-y += sound.h
-header-y += stddef.h
 header-y += synclink.h
 header-y += telephony.h
 header-y += termios.h
@@ -318,6 +317,7 @@
 unifdef-y += sonypi.h
 unifdef-y += soundcard.h
 unifdef-y += stat.h
+unifdef-y += stddef.h
 unifdef-y += sysctl.h
 unifdef-y += tcp.h
 unifdef-y += time.h