diff --git a/cameo/fped2stl.pl b/cameo/fped2stl.pl
index 109b50c..79940b9 100755
--- a/cameo/fped2stl.pl
+++ b/cameo/fped2stl.pl
@@ -51,8 +51,7 @@ print STDERR "$name $z ...\n";
 
 	while (<RR>) {
 		s/cameo/$name/;
-		s/(vertex.*)0\.0*e\+00$/$1$z/;
-		s/(vertex.*)1\.0*e\+00$/$1$z1/;
+		s/(vertex.*)0\.0*e\+00$/$1$z/ || s/(vertex.*)1\.0*e\+00$/$1$z1/;
 		print;
 	}
 	close RR;