diff --git a/libc/include/time64.h b/libc/include/time64.h
index 7ec05af..b4f1280 100644
--- a/libc/include/time64.h
+++ b/libc/include/time64.h
@@ -31,29 +31,41 @@
 #ifndef TIME64_H
 #define TIME64_H
 
+#if defined(__LP64__)
+
+/* TODO: remove this when external/chromium_org is fixed. */
+#define time64_t time_t
+#define gmtime64_r gmtime_r
+#define localtime64_r localtime_r
+#define mktime64 mktime
+#define timegm64 timegm
+
+#else
+
+/* Legacy cruft for LP32 where time_t was 32-bit. */
+
 #include <sys/cdefs.h>
 #include <time.h>
 #include <stdint.h>
 
 __BEGIN_DECLS
 
-typedef int64_t  time64_t;
+typedef int64_t time64_t;
 
-struct tm *gmtime64_r (const time64_t *, struct tm *);
-struct tm *localtime64_r (const time64_t *, struct tm *);
-struct tm *gmtime64 (const time64_t *);
-struct tm *localtime64 (const time64_t *);
-
-char *asctime64 (const struct tm *);
-char *asctime64_r (const struct tm *, char *);
-
-char *ctime64 (const time64_t*);
-char *ctime64_r (const time64_t*, char*);
-
-time64_t timegm64 (const struct tm *);
-time64_t mktime64 (const struct tm *);
-time64_t timelocal64 (const struct tm *);
+char* asctime64(const struct tm*);
+char* asctime64_r(const struct tm*, char*);
+char* ctime64(const time64_t*);
+char* ctime64_r(const time64_t*, char*);
+struct tm* gmtime64(const time64_t*);
+struct tm* gmtime64_r(const time64_t*, struct tm*);
+struct tm* localtime64(const time64_t*);
+struct tm* localtime64_r(const time64_t*, struct tm*);
+time64_t mktime64(const struct tm*);
+time64_t timegm64(const struct tm*);
+time64_t timelocal64(const struct tm*);
 
 __END_DECLS
 
+#endif
+
 #endif /* TIME64_H */