diff --git a/drivers/laplacian.c b/drivers/laplacian.c
index 9a9da85deb1f510e9b3c8c16113881d33ec9f83b..b49b85581d5303001815861e55ee1bb78753b405 100644
--- a/drivers/laplacian.c
+++ b/drivers/laplacian.c
@@ -290,7 +290,7 @@ genLaplacian( const char    *filename,
         return rc;
 
     spm->flttype = flttype;
-    spm->n = spm->gN = dim1 * dim2 * dim3;
+    spm->n = dim1 * dim2 * dim3;
 
     laplacian_7points[spm->flttype](spm, dim1, dim2, dim3, alpha, beta);
 
@@ -344,7 +344,7 @@ genExtendedLaplacian( const char    *filename,
         return rc;
 
     spm->flttype = flttype;
-    spm->n = spm->gN = dim1 * dim2 * dim3;
+    spm->n = dim1 * dim2 * dim3;
 
     if( dim3 > 0 ) {
         extended_laplacian_table3D[spm->flttype](spm, dim1, dim2, dim3);