diff --git a/Eigen/src/Core/MapBase.h b/Eigen/src/Core/MapBase.h
index a9828f7f4..81efc4a6d 100644
--- a/Eigen/src/Core/MapBase.h
+++ b/Eigen/src/Core/MapBase.h
@@ -149,6 +149,10 @@ template<typename Derived> class MapBase<Derived, ReadOnlyAccessors>
       checkSanity();
     }
 
+    #ifdef EIGEN_MAPBASE_PLUGIN
+    #include EIGEN_MAPBASE_PLUGIN
+    #endif
+
   protected:
 
     void checkSanity() const
diff --git a/doc/PreprocessorDirectives.dox b/doc/PreprocessorDirectives.dox
index 8a2968ebb..cfaba35d8 100644
--- a/doc/PreprocessorDirectives.dox
+++ b/doc/PreprocessorDirectives.dox
@@ -91,6 +91,7 @@ following macros are supported; none of them are defined by default.
  - \b EIGEN_MATRIX_PLUGIN - filename of plugin for extending the Matrix class.
  - \b EIGEN_MATRIXBASE_PLUGIN - filename of plugin for extending the MatrixBase class.
  - \b EIGEN_PLAINOBJECTBASE_PLUGIN - filename of plugin for extending the PlainObjectBase class.
+ - \b EIGEN_MAPBASE_PLUGIN - filename of plugin for extending the MapBase class.
  - \b EIGEN_QUATERNIONBASE_PLUGIN - filename of plugin for extending the QuaternionBase class.
  - \b EIGEN_SPARSEMATRIX_PLUGIN - filename of plugin for extending the SparseMatrix class.
  - \b EIGEN_SPARSEMATRIXBASE_PLUGIN - filename of plugin for extending the SparseMatrixBase class.