diff --git src/logging.cc src/logging.cc
--- src/logging.cc
+++ src/logging.cc
@@ -1437,3 +1437,6 @@
+             << setfill(' ') << setw(5)
+             << static_cast<unsigned int>(getpid()) << setfill('0')
+             << ' '
              << setfill(' ') << setw(5)
              << static_cast<unsigned int>(GetTID()) << setfill('0')
              << ' '
--