diff --git a/src/userobjects/FFTBufferBase.C b/src/userobjects/FFTBufferBase.C
index 7544c8ac..acbec673 100644
--- a/src/userobjects/FFTBufferBase.C
+++ b/src/userobjects/FFTBufferBase.C
@@ -118,7 +118,8 @@ FFTBufferBase<T>::FFTBufferBase(const InputParameters & parameters)
     // precompute kvector components for current direction
     _k_table[i].resize(_grid[i]);
     for (int j = 0; j < _grid[i]; ++j)
-      _k_table[i][j] = ((j < (_grid[i] >> 1) + 1) ? Real(j) : (Real(j) - _grid[i])) / _box_size(i);
+      _k_table[i][j] = 2.0 * libMesh::pi *
+                       ((j < (_grid[i] >> 1) + 1) ? Real(j) : (Real(j) - _grid[i])) / _box_size(i);
   }
   _real_space_data.resize(real_space_buffer_size);
   _reciprocal_space_data.resize(reciprocal_space_buffer_size);