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diff --git a/lapacke/utils/lapacke_dhs_nancheck.c b/lapacke/utils/lapacke_dhs_nancheck.c
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+++ b/lapacke/utils/lapacke_dhs_nancheck.c
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+/*****************************************************************************
+  Copyright (c) 2010, Intel Corp.
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+    * Neither the name of Intel Corporation nor the names of its contributors
+      may be used to endorse or promote products derived from this software
+      without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+  THE POSSIBILITY OF SUCH DAMAGE.
+******************************************************************************
+* Contents: Native C interface to LAPACK utility function
+* Author: Intel Corporation
+* Created in February, 2010
+*****************************************************************************/
+#include "lapacke_utils.h"
+
+/* Check a matrix for NaN entries. */
+
+lapack_logical LAPACKE_dhs_nancheck( int matrix_order, lapack_int n,
+                                      const double *a,
+                                      lapack_int lda )
+{
+    lapack_logical subdiag_nans;
+
+    if( a == NULL ) return (lapack_logical) 0;
+
+    /* Check subdiagonal first */
+    if( matrix_order == LAPACK_COL_MAJOR ) {
+        subdiag_nans = LAPACKE_d_nancheck( n-1, &a[1], lda+1 );
+    } else if ( matrix_order == LAPACK_ROW_MAJOR ) {
+        subdiag_nans = LAPACKE_d_nancheck( n-1, &a[lda], lda+1 );
+    } else {
+        return (lapack_logical) 0;
+    }
+
+    /* Check upper triangular if subdiagonal has no NaNs. */
+    return subdiag_nans || LAPACKE_dtr_nancheck( matrix_order, 'u', 'n',
+                                                 n, a, lda);
+}