diff --git a/core/src/tetrahedral_polytope.hh b/core/src/tetrahedral_polytope.hh
index 5cb5922e8c302cfd373351eb61546950121c231a..e75d01cd603e0232c4a06f2157deaaf1b3c6ab53 100644
--- a/core/src/tetrahedral_polytope.hh
+++ b/core/src/tetrahedral_polytope.hh
@@ -57,7 +57,7 @@ struct TetrahedralPolytope{
   // bounds[4] : e1max
   // bounds[5] : e2max
   // bounds[6] : e3max
-  // bounds[7] : e3max  
+  // bounds[7] : e4max  
   // where ex are the tetrahedral polytope basevectors
 }__attribute__ ((aligned (16)));