diff --git a/flopy/mf6/utils/postprocessing.py b/flopy/mf6/utils/postprocessing.py
index bf4bee94bc..5dab92cb4b 100644
--- a/flopy/mf6/utils/postprocessing.py
+++ b/flopy/mf6/utils/postprocessing.py
@@ -1,5 +1,5 @@
 import numpy as np
-from .binarygrid_util import MfGrdFile
+from flopy.mf6.utils.binarygrid_util import MfGrdFile
 
 
 def get_structured_faceflows(
@@ -60,7 +60,7 @@ def get_structured_faceflows(
     shape = (grb.nlay, grb.nrow, grb.ncol)
     frf = np.zeros(shape, dtype=float).flatten()
     fff = np.zeros(shape, dtype=float).flatten()
-    flf = np.zeros(shape, dtype=float)
+    flf = np.zeros(shape, dtype=float).flatten()
 
     # fill flow terms
     vmult = [-1.0, -1.0, -1.0]