diff --git a/lemon/cbc.cc b/lemon/cbc.cc
--- a/lemon/cbc.cc
+++ b/lemon/cbc.cc
@@ -25,12 +25,7 @@
 #include <coin/CbcModel.hpp>
 #include <coin/OsiSolverInterface.hpp>
 
-#ifdef COIN_HAS_CLP
 #include "coin/OsiClpSolverInterface.hpp"
-#endif
-#ifdef COIN_HAS_OSL
-#include "coin/OsiOslSolverInterface.hpp"
-#endif
 
 #include "coin/CbcCutGenerator.hpp"
 #include "coin/CbcHeuristicLocal.hpp"
@@ -270,13 +265,7 @@
     if (_osi_solver) {
       delete _osi_solver;
     }
-#ifdef COIN_HAS_CLP
     _osi_solver = new OsiClpSolverInterface();
-#elif COIN_HAS_OSL
-    _osi_solver = new OsiOslSolverInterface();
-#else
-#error Cannot instantiate Osi solver
-#endif
 
     _osi_solver->loadFromCoinModel(*_prob);
 
@@ -328,13 +317,11 @@
       CglFlowCover flowGen;
       _cbc_model->addCutGenerator(&flowGen, -1, "FlowCover");
 
-#ifdef COIN_HAS_CLP
       OsiClpSolverInterface* osiclp =
         dynamic_cast<OsiClpSolverInterface*>(_cbc_model->solver());
       if (osiclp->getNumRows() < 300 && osiclp->getNumCols() < 500) {
         osiclp->setupForRepeatedUse(2, 0);
       }
-#endif
 
       CbcRounding heuristic1(*_cbc_model);
       heuristic1.setWhen(3);