diff --git a/Eigen/src/SparseCore/SparseBlock.h b/Eigen/src/SparseCore/SparseBlock.h
index 0b3e193db..b6a2d232c 100644
--- a/Eigen/src/SparseCore/SparseBlock.h
+++ b/Eigen/src/SparseCore/SparseBlock.h
@@ -66,6 +66,8 @@ public:
     typename XprType::Nested m_matrix;
     Index m_outerStart;
     const internal::variable_if_dynamic<Index, OuterSize> m_outerSize;
+
+    EIGEN_INHERIT_ASSIGNMENT_OPERATORS(BlockImpl)
 };