diff --git a/contrib/pg_upgrade/option.c b/contrib/pg_upgrade/option.c
new file mode 100644
index 250aeb8..6bd91c5
*** a/contrib/pg_upgrade/option.c
--- b/contrib/pg_upgrade/option.c
***************
*** 25,30 ****
--- 25,31 ----
  static void usage(void);
  static void check_required_directory(char **dirpath, char **configpath,
  				   char *envVarName, char *cmdLineOption, char *description);
+ #define FIX_DEFAULT_READ_ONLY "-c default_transaction_read_only=false"
  
  
  UserOpts	user_opts;
*************** parseCommandLine(int argc, char *argv[])
*** 208,213 ****
--- 209,225 ----
  		fclose(fp);
  	}
  
+ 	/* Turn off read-only mode;  add prefix to PGOPTIONS? */
+ 	if (getenv("PGOPTIONS"))
+ 	{
+ 		char *pgoptions = psprintf("%s %s", FIX_DEFAULT_READ_ONLY,
+ 									getenv("PGOPTIONS"));
+ 		pg_putenv("PGOPTIONS", pgoptions);
+ 		pfree(pgoptions);
+ 	}
+ 	else
+ 		pg_putenv("PGOPTIONS", FIX_DEFAULT_READ_ONLY);
+ 
  	/* Get values from env if not already set */
  	check_required_directory(&old_cluster.bindir, NULL, "PGBINOLD", "-b",
  							 "old cluster binaries reside");