diff --git a/build/dsp5tocvs.pl b/build/dsp5tocvs.pl
index 47867e6cb6..ed1f080f80 100644
--- a/build/dsp5tocvs.pl
+++ b/build/dsp5tocvs.pl
@@ -8,11 +8,14 @@ sub tovc6 {
 
     if (m|.dsp$|) {
 	$tname = '.#' . $_;
+	$verchg = 0;
 	print "Convert VC6 project " . $_ . " to VC5 in " . $File::Find::dir . "\n"; 
 	$srcfl = new IO::File $_, "r" || die;
 	$dstfl = new IO::File $tname, "w" || die;
 	while ($src = <$srcfl>) {
-	    $src =~ s|Format Version 5\.00|Format Version 6\.00|;
+	    if ($src =~ s|Format Version 5\.00|Format Version 6\.00|) {
+		$verchg = -1;
+	    }
 	    $src =~ s|^(# ADD CPP .*)/Zi (.*)|$1/ZI $2|;
 	    $src =~ s|^(# ADD BASE CPP .*)/Zi (.*)|$1/ZI $2|;
 	    if ($src =~ s|^(!MESSAGE .*)\\\n|$1|) {
@@ -20,8 +23,9 @@ sub tovc6 {
 		$src = $src . $cont;
             }
             print $dstfl $src; 
-	    if ($src =~ m|^# Begin Project|) {
-		print $dstfl "# PROP AllowPerConfigDependencies 0\n"; }
+	    if ($verchg && $src =~ m|^# Begin Project|) {
+		print $dstfl "# PROP AllowPerConfigDependencies 0\n"; 
+	    }
 	}
 	undef $srcfl;
 	undef $dstfl;