diff --git a/modules/util/viirs_surfrad.py b/modules/util/viirs_surfrad.py
index 6a2722ca3437cfa831f86f5c951b48def2ac7150..c1ebe11ec49ffa9a8edab8f963be05c1e3a1bfd2 100644
--- a/modules/util/viirs_surfrad.py
+++ b/modules/util/viirs_surfrad.py
@@ -182,7 +182,7 @@ def run_all(directory, out_directory, day_night='ANY', pattern='clavrx_*.nc', st
         train_i = np.stack(train_tiles_i)
         train_m = np.stack(train_tiles_m)
         np.save(out_directory + 'train_ires_' + str(cnt), train_i)
-        np.save(out_directory + 'train_mres' + str(cnt), train_m)
+        np.save(out_directory + 'train_mres_' + str(cnt), train_m)
         num_train_samples = train_m.shape[0]
 
     print('  num_train_samples, num_valid_samples, progress % : ', num_train_samples, num_valid_samples,