diff --git a/Polynomial/include/CGAL/Polynomial/polynomial_gcd_ntl.h b/Polynomial/include/CGAL/Polynomial/polynomial_gcd_ntl.h
index a46096424fb..554e68091b2 100644
--- a/Polynomial/include/CGAL/Polynomial/polynomial_gcd_ntl.h
+++ b/Polynomial/include/CGAL/Polynomial/polynomial_gcd_ntl.h
@@ -51,7 +51,7 @@
 #include<CGAL/leda_integer.h>
 #endif
 
-#ifdef LiS_HAVE_CORE
+#ifdef CGAL_USE_CORE
 #include<CGAL/CORE_BigInt.h>
 #endif