diff --git a/test_files/stamping/test_GuideBank04/xmsng_base.txt b/test_files/stamping/test_GuideBank04/xmsng_base.txt
index 7af741a..c8053b2 100644
--- a/test_files/stamping/test_GuideBank04/xmsng_base.txt
+++ b/test_files/stamping/test_GuideBank04/xmsng_base.txt
@@ -356,9 +356,9 @@ TRIANGLES 732
         58         60         61
         58         61         59
         58         88         60
-        60         78         79
-        60         79         61
+        60         78         61
         60         88         78
+        61         78         79
         62         63         65
         62         64         80
         62         65         64