diff --git a/src/base/trace.cc b/src/base/trace.cc
index 52faa8d725..272b035e0f 100644
--- a/src/base/trace.cc
+++ b/src/base/trace.cc
@@ -38,7 +38,6 @@
 
 #include "base/atomicio.hh"
 #include "base/logging.hh"
-#include "base/output.hh"
 #include "base/str.hh"
 #include "debug/FmtFlag.hh"
 #include "debug/FmtStackTrace.hh"