diff --git a/workflow/rocoto/gefs_tasks.py b/workflow/rocoto/gefs_tasks.py
index 4c77ed483b..4ca1cc29d7 100644
--- a/workflow/rocoto/gefs_tasks.py
+++ b/workflow/rocoto/gefs_tasks.py
@@ -327,7 +327,7 @@ def wavepostsbs(self):
         for key, value in wave_post_dict.items():
             wave_post_envars.append(rocoto.create_envar(name=key, value=str(value)))
 
-        task_name = f'gefs_wave_post_grid_#member#_f#fhr#'
+        task_name = f'gefs_wave_post_grid_mem#member#_f#fhr#'
         task_dict = {'task_name': task_name,
                      'resources': resources,
                      'dependency': dependencies,
@@ -342,7 +342,7 @@ def wavepostsbs(self):
         fhrs = self._get_forecast_hours('gefs', self._configs['wavepostsbs'])
         fhr_var_dict = {'fhr': ' '.join([f"{fhr:03d}" for fhr in fhrs])}
 
-        fhr_metatask_dict = {'task_name': f'gefs_wave_post_grid_#member#',
+        fhr_metatask_dict = {'task_name': f'gefs_wave_post_grid_mem#member#',
                              'task_dict': task_dict,
                              'var_dict': fhr_var_dict}
 
@@ -478,7 +478,7 @@ def wavepostpnt(self):
     def extractvars(self):
         deps = []
         if self.app_config.do_wave:
-            dep_dict = {'type': 'metatask', 'name': 'gefs_wave_post_grid_#member#'}
+            dep_dict = {'type': 'metatask', 'name': 'gefs_wave_post_grid_mem#member#'}
             deps.append(rocoto.add_dependency(dep_dict))
         if self.app_config.do_ocean:
             dep_dict = {'type': 'metatask', 'name': 'gefs_ocean_prod_#member#'}