diff --git a/src/bin/pg_dump/pg_restore.c b/src/bin/pg_dump/pg_restore.c
new file mode 100644
index b21fd26..239b0d8
*** a/src/bin/pg_dump/pg_restore.c
--- b/src/bin/pg_dump/pg_restore.c
*************** main(int argc, char **argv)
*** 330,335 ****
--- 330,351 ----
  		exit_nicely(1);
  	}
  
+ 	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)
+ 	{
+ 		fprintf(stderr, _("%s: maximum number of parallel jobs is %d\n"),
+ 				progname, MAXIMUM_WAIT_OBJECTS);
+ 		exit(1);
+ 	}
+ #endif
+ 
  	/* Can't do single-txn mode with multiple connections */
  	if (opts->single_txn && numWorkers > 1)
  	{
*************** main(int argc, char **argv)
*** 402,417 ****
  	if (opts->tocFile)
  		SortTocFromFile(AH);
  
- 	/* See comments in pg_dump.c */
- #ifdef WIN32
- 	if (numWorkers > MAXIMUM_WAIT_OBJECTS)
- 	{
- 		fprintf(stderr, _("%s: maximum number of parallel jobs is %d\n"),
- 				progname, MAXIMUM_WAIT_OBJECTS);
- 		exit(1);
- 	}
- #endif
- 
  	AH->numWorkers = numWorkers;
  
  	if (opts->tocSummary)
--- 418,423 ----