diff --git a/src/bin/pg_dump/pg_restore.c b/src/bin/pg_dump/pg_restore.c
new file mode 100644
index b21fd26..b69082d
*** a/src/bin/pg_dump/pg_restore.c
--- b/src/bin/pg_dump/pg_restore.c
*************** main(int argc, char **argv)
*** 402,407 ****
--- 402,413 ----
  	if (opts->tocFile)
  		SortTocFromFile(AH);
  
+ 	if (numWorkers <= 0)
+ 	{
+ 		fprintf(stderr, _("%s: invalid number of parallel jobs\n"), progname);
+ 		exit(1);
+ 	}
+ 
  	/* See comments in pg_dump.c */
  #ifdef WIN32
  	if (numWorkers > MAXIMUM_WAIT_OBJECTS)