diff --git a/Periodic_3_triangulation_3/include/CGAL/Periodic_3_Delaunay_triangulation_3.h b/Periodic_3_triangulation_3/include/CGAL/Periodic_3_Delaunay_triangulation_3.h
index 5db31dd2831..8ee39c15c13 100644
--- a/Periodic_3_triangulation_3/include/CGAL/Periodic_3_Delaunay_triangulation_3.h
+++ b/Periodic_3_triangulation_3/include/CGAL/Periodic_3_Delaunay_triangulation_3.h
@@ -477,7 +477,7 @@ private:
   class Point_hider;
 
 #ifndef CGAL_CFG_OUTOFLINE_TEMPLATE_MEMBER_DEFINITION_BUG
-  template <class Triangulation_R3> struct Vertex_remover;
+  template <class TriangulationR3> struct Vertex_remover;
 #else
   template <class TriangulationR3>
   struct Vertex_remover