diff --git a/sched/sched/sched.h b/sched/sched/sched.h
index c876eb205b..37b7c51e5c 100644
--- a/sched/sched/sched.h
+++ b/sched/sched/sched.h
@@ -297,6 +297,10 @@ extern volatile spinlock_t g_cpu_tasklistlock;
  * Public Function Prototypes
  ****************************************************************************/
 
+int nxthread_create(FAR const char *name, uint8_t ttype, int priority,
+                    FAR void *stack_ptr, int stack_size, main_t entry,
+                    FAR char * const argv[], FAR char * const envp[]);
+
 /* Task list manipulation functions */
 
 bool nxsched_add_readytorun(FAR struct tcb_s *rtrtcb);
diff --git a/sched/task/task_create.c b/sched/task/task_create.c
index 11692184b0..0442a17355 100644
--- a/sched/task/task_create.c
+++ b/sched/task/task_create.c
@@ -39,7 +39,7 @@
 #include "task/task.h"
 
 /****************************************************************************
- * Private Functions
+ * Public Functions
  ****************************************************************************/
 
 /****************************************************************************
@@ -70,9 +70,9 @@
  *
  ****************************************************************************/
 
-static int nxthread_create(FAR const char *name, uint8_t ttype, int priority,
-                           FAR void *stack_ptr, int stack_size, main_t entry,
-                           FAR char * const argv[], FAR char * const envp[])
+int nxthread_create(FAR const char *name, uint8_t ttype, int priority,
+                    FAR void *stack_ptr, int stack_size, main_t entry,
+                    FAR char * const argv[], FAR char * const envp[])
 {
   FAR struct task_tcb_s *tcb;
   pid_t pid;
@@ -112,10 +112,6 @@ static int nxthread_create(FAR const char *name, uint8_t ttype, int priority,
   return (int)pid;
 }
 
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
 /****************************************************************************
  * Name: nxtask_create
  *
diff --git a/sched/task/task_posixspawn.c b/sched/task/task_posixspawn.c
index 8d7e357049..b451291ed5 100644
--- a/sched/task/task_posixspawn.c
+++ b/sched/task/task_posixspawn.c
@@ -388,10 +388,10 @@ int posix_spawn(FAR pid_t *pid, FAR const char *path,
    * task.
    */
 
-  proxy = kthread_create("nxposix_spawn_proxy", param.sched_priority,
-                         CONFIG_POSIX_SPAWN_PROXY_STACKSIZE,
-                         (main_t)nxposix_spawn_proxy,
-                         (FAR char * const *)NULL);
+  proxy = nxthread_create("nxposix_spawn_proxy", TCB_FLAG_TTYPE_KERNEL,
+                          param.sched_priority, NULL,
+                          CONFIG_POSIX_SPAWN_PROXY_STACKSIZE,
+                          nxposix_spawn_proxy, NULL, environ);
   if (proxy < 0)
     {
       ret = -proxy;