diff --git a/PGBuild/Modules/TestCollateLinuxUTF8.pm b/PGBuild/Modules/TestCollateLinuxUTF8.pm
index 465a1cd..19333f1 100644
--- a/PGBuild/Modules/TestCollateLinuxUTF8.pm
+++ b/PGBuild/Modules/TestCollateLinuxUTF8.pm
@@ -82,7 +82,7 @@ sub installcheck
     my $logpos = -s "$installdir/logfile" || 0;
 
     my @checklog;
-    my $cmd ="./pg_regress --psqldir=$installdir/bin --dlpath=. "
+    my $cmd ="./pg_regress --bindir=$installdir/bin --dlpath=. "
       ."$inputdir --port=$buildport collate.linux.utf8";
     @checklog = `cd $pgsql/src/test/regress && $cmd 2>&1`;