diff --git a/libc/bionic/fchmod.cpp b/libc/bionic/fchmod.cpp
index 6e020b6..ace8c6b 100644
--- a/libc/bionic/fchmod.cpp
+++ b/libc/bionic/fchmod.cpp
@@ -33,11 +33,11 @@
 #include <unistd.h>
 #include <stdio.h>
 
-extern "C" int __fchmod(int, mode_t);
+extern "C" int ___fchmod(int, mode_t);
 
 int fchmod(int fd, mode_t mode) {
   int saved_errno = errno;
-  int result = __fchmod(fd, mode);
+  int result = ___fchmod(fd, mode);
 
   if ((result == 0) || (errno != EBADF)) {
     return result;