diff --git a/src/sparse/KokkosSparse_BlockCrsMatrix.hpp b/src/sparse/KokkosSparse_BlockCrsMatrix.hpp
index b492af0c04..8c0ac22628 100644
--- a/src/sparse/KokkosSparse_BlockCrsMatrix.hpp
+++ b/src/sparse/KokkosSparse_BlockCrsMatrix.hpp
@@ -510,12 +510,17 @@ class BlockCrsMatrix {
 
   /// \brief Construct with a graph that will be shared.
   ///
+  /// \param[in] arg_label   The sparse matrix's label.
+  /// \param[in] arg_graph   The graph between the blocks.
+  /// \param[in] blockDimIn  The block size.
+  ///
   /// Allocate the values array for subsequent fill.
   BlockCrsMatrix(const std::string& arg_label,
                  const staticcrsgraph_type& arg_graph,
                  const OrdinalType& blockDimIn)
       : graph(arg_graph),
-        values(arg_label, arg_graph.entries.extent(0)),
+        values(arg_label,
+               arg_graph.entries.extent(0) * blockDimIn * blockDimIn),
         numCols_(maximum_entry(arg_graph) + 1),
         blockDim_(blockDimIn) {}
 
@@ -600,14 +605,11 @@ class BlockCrsMatrix {
   /// The matrix will store and use the row map, indices, and values
   /// directly (by view, not by deep copy).
   ///
-  /// \param label [in] The sparse matrix's label.
-  /// \param nrows [in] The number of rows.
-  /// \param ncols [in] The number of columns.
-  /// \param annz [in] The number of entries.
-  /// \param vals [in/out] The entries.
-  /// \param rows [in/out] The row map (containing the offsets to the
-  ///   data in each row).
-  /// \param cols [in/out] The column indices.
+  /// \param[in] label  The sparse matrix's label.
+  /// \param[in] ncols  The number of columns.
+  /// \param[in] vals   The entries.
+  /// \param[in] graph_ The graph between the blocks.
+  /// \param[in] blockDimIn  The block size.
   BlockCrsMatrix(const std::string& /*label*/, const OrdinalType& ncols,
                  const values_type& vals, const staticcrsgraph_type& graph_,
                  const OrdinalType& blockDimIn)
diff --git a/src/sparse/KokkosSparse_BsrMatrix.hpp b/src/sparse/KokkosSparse_BsrMatrix.hpp
index 51002043bb..19265547fe 100644
--- a/src/sparse/KokkosSparse_BsrMatrix.hpp
+++ b/src/sparse/KokkosSparse_BsrMatrix.hpp
@@ -443,11 +443,16 @@ class BsrMatrix {
 
   /// \brief Construct with a graph that will be shared.
   ///
+  /// \param[in] arg_label   The sparse matrix's label.
+  /// \param[in] arg_graph   The graph between the blocks.
+  /// \param[in] blockDimIn  The block size.
+  ///
   /// Allocate the values array for subsequent fill.
   BsrMatrix(const std::string& arg_label, const staticcrsgraph_type& arg_graph,
             const OrdinalType& blockDimIn)
       : graph(arg_graph),
-        values(arg_label, arg_graph.entries.extent(0)),
+        values(arg_label,
+               arg_graph.entries.extent(0) * blockDimIn * blockDimIn),
         numCols_(maximum_entry(arg_graph) + 1),
         blockDim_(blockDimIn) {}
 
@@ -625,14 +630,11 @@ class BsrMatrix {
   /// The matrix will store and use the row map, indices, and values
   /// directly (by view, not by deep copy).
   ///
-  /// \param label [in] The sparse matrix's label.
-  /// \param nrows [in] The number of rows.
-  /// \param ncols [in] The number of columns.
-  /// \param annz [in] The number of entries.
-  /// \param vals [in/out] The entries.
-  /// \param rows [in/out] The row map (containing the offsets to the
-  ///   data in each row).
-  /// \param cols [in/out] The column indices.
+  /// \param[in] label  The sparse matrix's label.
+  /// \param[in] ncols  The number of columns.
+  /// \param[in] vals   The entries.
+  /// \param[in] graph_ The graph between the blocks.
+  /// \param[in] blockDimIn  The block size.
   BsrMatrix(const std::string& /*label*/, const OrdinalType& ncols,
             const values_type& vals, const staticcrsgraph_type& graph_,
             const OrdinalType& blockDimIn)