diff --git a/src/bin/psql/startup.c b/src/bin/psql/startup.c
index 780479c8d7..1364e1aa13 100644
--- a/src/bin/psql/startup.c
+++ b/src/bin/psql/startup.c
@@ -25,7 +25,7 @@
 #include "input.h"
 #include "mainloop.h"
 #include "settings.h"
-
+#include "libpq-trace.h"
 /*
  * Global psql options
  */
@@ -300,6 +300,12 @@ main(int argc, char *argv[])
 		exit(EXIT_BADCONN);
 	}
 
+	{
+		FILE *fp = fopen("hoge.trc", "a");
+		Assert (fp);
+		PQtrace(pset.db, fp);
+	}
+	
 	psql_setup_cancel_handler();
 
 	PQsetNoticeProcessor(pset.db, NoticeProcessor, NULL);