diff --git a/Modular_arithmetic/include/CGAL/Modular_arithmetic/Modular_type.h b/Modular_arithmetic/include/CGAL/Modular_arithmetic/Modular_type.h
index 2b01bf59cbe..6d1441c8ae9 100644
--- a/Modular_arithmetic/include/CGAL/Modular_arithmetic/Modular_type.h
+++ b/Modular_arithmetic/include/CGAL/Modular_arithmetic/Modular_type.h
@@ -45,7 +45,7 @@ private:
     /* Quick integer rounding, valid if a<2^51. for double */ 
     static inline 
     double MOD_round (double a){
-#ifdef LiS_HAVE_LEDA 
+#ifdef CGAL_USE_LEDA 
         return ( (a + CST_CUT)  - CST_CUT); 
 #else
      // TODO: