diff --git a/include/spawn.h b/include/spawn.h
index 64f35c83838..2e5a759d4c9 100644
--- a/include/spawn.h
+++ b/include/spawn.h
@@ -48,13 +48,13 @@
  * posix_spawnattr_t object using the posix_spawnattr_setflags() function:"
  */
 
-#define POSIX_SPAWN_RESETIDS      (1 << 0)  /* 1: Reset effective user ID */
-#define POSIX_SPAWN_SETPGROUP     (1 << 1)  /* 1: Set process group */
-#define POSIX_SPAWN_SETSCHEDPARAM (1 << 2)  /* 1: Set task's priority */
-#define POSIX_SPAWN_SETSCHEDULER  (1 << 3)  /* 1: Set task's scheduler policy */
-#define POSIX_SPAWN_SETSIGDEF     (1 << 4)  /* 1: Set default signal actions */
-#define POSIX_SPAWN_SETSIGMASK    (1 << 5)  /* 1: Set sigmask */
-#define POSIX_SPAWN_SETSID        (1 << 7)  /* 1: Create the new session(glibc specific) */
+#define POSIX_SPAWN_RESETIDS      (1u << 0)  /* 1: Reset effective user ID */
+#define POSIX_SPAWN_SETPGROUP     (1u << 1)  /* 1: Set process group */
+#define POSIX_SPAWN_SETSCHEDPARAM (1u << 2)  /* 1: Set task's priority */
+#define POSIX_SPAWN_SETSCHEDULER  (1u << 3)  /* 1: Set task's scheduler policy */
+#define POSIX_SPAWN_SETSIGDEF     (1u << 4)  /* 1: Set default signal actions */
+#define POSIX_SPAWN_SETSIGMASK    (1u << 5)  /* 1: Set sigmask */
+#define POSIX_SPAWN_SETSID        (1u << 7)  /* 1: Create the new session(glibc specific) */
 
 /* NOTE: NuttX provides only one implementation:  If
  * CONFIG_LIBC_ENVPATH is defined, then only posix_spawnp() behavior
diff --git a/sched/task/task_spawnparms.c b/sched/task/task_spawnparms.c
index cc0cb5a2154..156c26343ec 100644
--- a/sched/task/task_spawnparms.c
+++ b/sched/task/task_spawnparms.c
@@ -158,7 +158,7 @@ int spawn_execattrs(pid_t pid, FAR const posix_spawnattr_t *attr)
   /* Firstly, set the signal mask if requested to do so */
 
 #ifndef CONFIG_DISABLE_ALL_SIGNALS
-  if ((attr->flags & POSIX_SPAWN_SETSIGMASK) != 0)
+  if ((attr->flags & POSIX_SPAWN_SETSIGMASK) != 0u)
     {
       FAR struct tcb_s *tcb = nxsched_get_tcb(pid);
       if (tcb)
@@ -172,7 +172,7 @@ int spawn_execattrs(pid_t pid, FAR const posix_spawnattr_t *attr)
    * to set the priority of the of the new task.
    */
 
-  if ((attr->flags & POSIX_SPAWN_SETSCHEDPARAM) != 0)
+  if ((attr->flags & POSIX_SPAWN_SETSCHEDPARAM) != 0u)
     {
 #ifdef CONFIG_SCHED_SPORADIC
       /* Get the current sporadic scheduling parameters.  Those will not be
@@ -192,7 +192,7 @@ int spawn_execattrs(pid_t pid, FAR const posix_spawnattr_t *attr)
            * then we will call nxsched_set_scheduler() below.
            */
 
-          if ((attr->flags & POSIX_SPAWN_SETSCHEDULER) == 0)
+          if ((attr->flags & POSIX_SPAWN_SETSCHEDULER) == 0u)
             {
               sinfo("Setting priority=%d for pid=%d\n",
                     param.sched_priority, pid);
@@ -207,7 +207,7 @@ int spawn_execattrs(pid_t pid, FAR const posix_spawnattr_t *attr)
    * preparation for the nxsched_set_scheduler() call below.
    */
 
-  else if ((attr->flags & POSIX_SPAWN_SETSCHEDULER) != 0)
+  else if ((attr->flags & POSIX_SPAWN_SETSCHEDULER) != 0u)
     {
       ret = nxsched_get_param(0, &param);
     }
@@ -216,7 +216,7 @@ int spawn_execattrs(pid_t pid, FAR const posix_spawnattr_t *attr)
    * setting determined above.
    */
 
-  if (ret == OK && (attr->flags & POSIX_SPAWN_SETSCHEDULER) != 0)
+  if (ret == OK && (attr->flags & POSIX_SPAWN_SETSCHEDULER) != 0u)
     {
       sinfo("Setting policy=%d priority=%d for pid=%d\n",
             attr->policy, param.sched_priority, pid);