--- src/AlgebraicCore/TmpLDP.C.orig	2018-05-17 09:54:09.000000000 -0600
+++ src/AlgebraicCore/TmpLDP.C	2018-06-16 21:36:16.080330264 -0600
@@ -15,6 +15,7 @@
 #include "CoCoA/matrix.H"
 #include "CoCoA/ring.H"
 #include "CoCoA/utils.H"
+#include "CoCoA/SparsePolyOps-RingElem.H"
 
 using namespace CoCoA;