diff --git a/sched/environ/env_dup.c b/sched/environ/env_dup.c
index c588aa8376..3e3be281e8 100644
--- a/sched/environ/env_dup.c
+++ b/sched/environ/env_dup.c
@@ -125,6 +125,7 @@ int env_dup(FAR struct task_group_s *group, FAR char * const *envcp)
                         }
 
                       group_free(group, envp);
+                      envp = NULL;
                       ret = -ENOMEM;
                       break;
                     }