diff --git a/libc/include/sys/cdefs.h b/libc/include/sys/cdefs.h
index 27952b9..26dd9a2 100644
--- a/libc/include/sys/cdefs.h
+++ b/libc/include/sys/cdefs.h
@@ -245,6 +245,16 @@
 #define __RENAME_LDBL(rewrite,rewrite_api_level,regular_api_level) __RENAME(rewrite) __INTRODUCED_IN(rewrite_api_level)
 #endif
 
+/*
+ * On all architectures, `struct stat` == `struct stat64`, but LP32 didn't gain the *64 functions
+ * until API level 21.
+ */
+#if defined(__LP64__) || defined(__BIONIC_LP32_USE_STAT64)
+#define __RENAME_STAT64(rewrite,rewrite_api_level,regular_api_level) __INTRODUCED_IN(regular_api_level)
+#else
+#define __RENAME_STAT64(rewrite,rewrite_api_level,regular_api_level) __RENAME(rewrite) __INTRODUCED_IN(rewrite_api_level)
+#endif
+
 /* glibc compatibility. */
 #if defined(__LP64__)
 #define __WORDSIZE 64