diff --git a/gdb/vsis-gdb.sty b/gdb/vsis-gdb.sty
index d84fd82..39ad067 100644
--- a/gdb/vsis-gdb.sty
+++ b/gdb/vsis-gdb.sty
@@ -107,9 +107,8 @@
     font=\footnotesize,
   },
   erbt/.style={
-    isosceles triangle, isosceles triangle apex angle=60,
-    shape border rotate=-90,
-    draw, black, very thick, minimum size=3em
+   regular polygon, regular polygon sides=6,
+   draw, black, very thick, minimum size=3em
   },
 % Layout fuer referenzgraphen
   refGraph/.style={