diff --git a/reg3.cpp b/reg3.cpp
index 534caac8..05d4ff50 100644
--- a/reg3.cpp
+++ b/reg3.cpp
@@ -132,7 +132,7 @@ EX namespace reg3 {
     ld vertex_distance;
     
     if(cgflags & qIDEAL) {
-      vertex_distance = 10;
+      vertex_distance = 13;
       }
     
     else {