diff --git a/CMakeLists.txt b/CMakeLists.txt
index 74b6e53758b11ac963ed99938de4716cd7601fe6..af000c454170271ba8b73becfeee058281dcc131 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -699,6 +699,7 @@ if(ENABLE_OPTHOM)
   include_directories(contrib/HighOrderMeshOptimizer)
   add_subdirectory(contrib/MeshOptimizer)
   include_directories(contrib/MeshOptimizer)
+  include_directories(${CMAKE_CURRENT_BINARY_DIR}/contrib/MeshOptimizer)
   add_subdirectory(contrib/MeshQualityOptimizer)
   include_directories(contrib/MeshQualityOptimizer)
   set_config_option(HAVE_OPTHOM "OptHom")
diff --git a/contrib/MeshOptimizer/MeshOptCommon.h b/contrib/MeshOptimizer/MeshOptCommon.h
index 948f1bd8975aef0011ddb2c24ba661d870a0f553..232fd359c2f805fc49ca22293a32f8ab476b77fe 100644
--- a/contrib/MeshOptimizer/MeshOptCommon.h
+++ b/contrib/MeshOptimizer/MeshOptCommon.h
@@ -33,7 +33,7 @@
 
 #include <vector>
 #include "GmshMessage.h"
-//#include "MeshOptimizerConfig.h"
+#include "MeshOptimizerConfig.h"
 
 class MElement;
 class GEntity;