diff --git a/hyperpoint.cpp b/hyperpoint.cpp
index 5d9f2ecd..de0c4dcf 100644
--- a/hyperpoint.cpp
+++ b/hyperpoint.cpp
@@ -702,6 +702,8 @@ EX transmatrix rpushxto0(const hyperpoint& H) {
 
 EX transmatrix ggpushxto0(const hyperpoint& H, ld co) {
   if(translatable) {
+    if(nonisotropic)
+      return co > 0 ? eupush(H) : inverse(eupush(H));
     return eupush(co * H);
     }
   if(prod) {