diff --git a/solvers/mp2nl/mp2nlmodelapi.cc b/solvers/mp2nl/mp2nlmodelapi.cc
index 4e107806a..e11550fc1 100644
--- a/solvers/mp2nl/mp2nlmodelapi.cc
+++ b/solvers/mp2nl/mp2nlmodelapi.cc
@@ -1306,7 +1306,7 @@ class MP2NLSolverImpl
         return;
       }
       int i0 = sparse_entry.first;
-      if (0 == (kind & 4))                   // variable suffix
+      if (0 == (kind & 3))                   // variable suffix
         i0 = mapi_.GetOldVarIndex(i0);
       suf[i0] = sparse_entry.second;
     }