diff --git a/chromium_src/chrome/browser/process_singleton_posix.cc b/chromium_src/chrome/browser/process_singleton_posix.cc
index 3a6176765f91..4891743710d1 100644
--- a/chromium_src/chrome/browser/process_singleton_posix.cc
+++ b/chromium_src/chrome/browser/process_singleton_posix.cc
@@ -351,7 +351,7 @@ class ScopedSocket {
 
 // Returns a random string for uniquifying profile connections.
 std::string GenerateCookie() {
-  return base::Uint64ToString(base::RandUint64());
+  return base::NumberToString(base::RandUint64());
 }
 
 bool CheckCookie(const base::FilePath& path, const base::FilePath& cookie) {