diff --git a/libc/integral/c.inc b/libc/integral/c.inc
index 5e00366ff..11fbbd946 100644
--- a/libc/integral/c.inc
+++ b/libc/integral/c.inc
@@ -130,6 +130,9 @@ typedef __UINT64_TYPE__ uint64_t;
 typedef __INTMAX_TYPE__ intmax_t;
 typedef __UINTMAX_TYPE__ uintmax_t;
 
+#define __DEFINED_max_align_t
+typedef long double max_align_t;
+
 #ifdef _COSMO_SOURCE
 #if ((__GNUC__ + 0) * 100 + (__GNUC_MINOR__ + 0) >= 406 || \
      defined(__llvm__)) &&                                 \