diff --git a/hyperpoint.cpp b/hyperpoint.cpp
index 6c46fa36..cde11642 100644
--- a/hyperpoint.cpp
+++ b/hyperpoint.cpp
@@ -413,7 +413,7 @@ EX ld material(const hyperpoint& h) {
   if(sphere) return intval(h, Hypc);
   else if(hyperbolic) return -intval(h, Hypc);
   else if(sl2) return h[2]*h[2] + h[3]*h[3] - h[0]*h[0] - h[1]*h[1];
-  else return h[LDIM] - 1;
+  else return h[LDIM];
   }
 
 EX ld zlevel(const hyperpoint &h) {