diff --git a/metplus/wrappers/ensemble_stat_wrapper.py b/metplus/wrappers/ensemble_stat_wrapper.py
index 92003071d..6cb50dd4a 100755
--- a/metplus/wrappers/ensemble_stat_wrapper.py
+++ b/metplus/wrappers/ensemble_stat_wrapper.py
@@ -438,19 +438,21 @@ def run_at_time_all_fields(self, time_info):
 
         # get point observation file if requested
         if self.c_dict['OBS_POINT_INPUT_TEMPLATE']:
-            point_obs_path = self.find_data(time_info, first_var_info, 'OBS_POINT')
+            point_obs_path = self.find_data(time_info, first_var_info, 'OBS_POINT',
+                                            return_list=True)
             if point_obs_path is None:
                 return
 
-            self.point_obs_files.append(point_obs_path)
+            self.point_obs_files.extend(point_obs_path)
 
         # get grid observation file if requested
         if self.c_dict['OBS_GRID_INPUT_TEMPLATE']:
-            grid_obs_path = self.find_data(time_info, first_var_info, 'OBS_GRID')
+            grid_obs_path = self.find_data(time_info, first_var_info, 'OBS_GRID',
+                                           return_list=True)
             if grid_obs_path is None:
                 return
 
-            self.grid_obs_files.append(grid_obs_path)
+            self.grid_obs_files.extend(grid_obs_path)
 
         # set field info
         fcst_field = self.get_all_field_info(var_list, 'FCST')