diff --git a/modules/deeplearning/cloud_fraction_fcn_abi.py b/modules/deeplearning/cloud_fraction_fcn_abi.py
index 87e04401fc42c79cee12dfcfa5eb8d8fc2691075..32ea7dbb83d4186bb91abc1c890f22d13aea3826 100644
--- a/modules/deeplearning/cloud_fraction_fcn_abi.py
+++ b/modules/deeplearning/cloud_fraction_fcn_abi.py
@@ -794,7 +794,9 @@ def run_evaluate_static(in_file, out_file, ckpt_dir):
 
     # Use this hack for now.
     off_earth = (bt <= 161.0)
+    night = np.isnan(refl)
     cld_frac_out[off_earth] = -1
+    cld_frac_out[np.invert(off_earth) & night] = -1
 
     # ---  Make a DataArray ----------------------------------------------------
     # var_names = ['cloud_fraction', 'temp_11_0um', 'refl_0_65um']
@@ -857,7 +859,9 @@ def run_evaluate_static_full_disk(in_file, out_file, ckpt_dir):
 
     # Use this hack for now.
     off_earth = (bt <= 161.0)
+    night = np.isnan(refl)
     cld_frac_out[off_earth] = -1
+    cld_frac_out[np.invert(off_earth) & night] = -1
 
     # ---   Make DataArray -------------------------------------------------
     # var_names = ['cloud_fraction', 'temp_11_0um', 'refl_0_65um']