diff --git a/libc/kernel/uapi/linux/const.h b/libc/kernel/uapi/linux/const.h
index c62a702..d83caad 100644
--- a/libc/kernel/uapi/linux/const.h
+++ b/libc/kernel/uapi/linux/const.h
@@ -30,7 +30,7 @@
 #define _ULL(x) (_AC(x, ULL))
 #define _BITUL(x) (_UL(1) << (x))
 #define _BITULL(x) (_ULL(1) << (x))
-#define __ALIGN_KERNEL(x,a) __ALIGN_KERNEL_MASK(x, (typeof(x)) (a) - 1)
+#define __ALIGN_KERNEL(x,a) __ALIGN_KERNEL_MASK(x, (__typeof__(x)) (a) - 1)
 #define __ALIGN_KERNEL_MASK(x,mask) (((x) + (mask)) & ~(mask))
 #define __KERNEL_DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
 #endif