diff --git a/flopy/plot/map.py b/flopy/plot/map.py
index 324901dffd..eb6b4d47c8 100644
--- a/flopy/plot/map.py
+++ b/flopy/plot/map.py
@@ -122,6 +122,11 @@ def plot_array(self, a, masked_values=None, **kwargs):
         # Use the model grid to pass back an array of the correct shape
         plotarray = self.mg.get_plottable_layer_array(a, self.layer)
 
+        # if masked_values are provided mask the plotting array
+        if masked_values is not None:
+            for mval in masked_values:
+                plotarray = np.ma.masked_values(plotarray, mval)
+
         # add NaN values to mask
         plotarray = np.ma.masked_where(np.isnan(plotarray), plotarray)