diff --git a/build/gen_junction_pir.pl b/build/gen_junction_pir.pl
index a30126c20a4..35973213933 100644
--- a/build/gen_junction_pir.pl
+++ b/build/gen_junction_pir.pl
@@ -50,5 +50,4 @@
     );
 }
 
-close $fh;
-0;
+close $fh or die $!;