diff --git a/binfmt/binfmt_execmodule.c b/binfmt/binfmt_execmodule.c
index 9b169114c90..6ea8d6beaa6 100644
--- a/binfmt/binfmt_execmodule.c
+++ b/binfmt/binfmt_execmodule.c
@@ -294,7 +294,7 @@ int exec_module(FAR struct binary_s *binp,
     }
 #endif
 
-  return (int)pid;
+  return pid;
 
 errout_with_tcbinit:
 #ifndef CONFIG_BUILD_KERNEL
diff --git a/fs/procfs/fs_procfs.c b/fs/procfs/fs_procfs.c
index be5bd260783..11505e0e04b 100644
--- a/fs/procfs/fs_procfs.c
+++ b/fs/procfs/fs_procfs.c
@@ -847,14 +847,14 @@ static int procfs_readdir(FAR struct inode *mountpt,
           FAR struct tcb_s *tcb = nxsched_get_tcb(pid);
           if (!tcb)
             {
-              ferr("ERROR: PID %d is no longer valid\n", (int)pid);
+              ferr("ERROR: PID %d is no longer valid\n", pid);
               return -ENOENT;
             }
 
           /* Save the filename=pid and file type=directory */
 
           entry->d_type = DTYPE_DIRECTORY;
-          procfs_snprintf(entry->d_name, NAME_MAX + 1, "%d", (int)pid);
+          procfs_snprintf(entry->d_name, NAME_MAX + 1, "%d", pid);
 
           /* Set up the next directory entry offset.  NOTE that we could use
            * the standard f_pos instead of our own private index.
diff --git a/fs/procfs/fs_procfsproc.c b/fs/procfs/fs_procfsproc.c
index 8d574c10d9a..81decce25b2 100644
--- a/fs/procfs/fs_procfsproc.c
+++ b/fs/procfs/fs_procfsproc.c
@@ -1474,7 +1474,7 @@ static int proc_open(FAR struct file *filep, FAR const char *relpath,
   tcb = nxsched_get_tcb(pid);
   if (tcb == NULL)
     {
-      ferr("ERROR: PID %d is no longer valid\n", (int)pid);
+      ferr("ERROR: PID %d is no longer valid\n", pid);
       return -ENOENT;
     }
 
@@ -1561,7 +1561,7 @@ static ssize_t proc_read(FAR struct file *filep, FAR char *buffer,
   tcb = nxsched_get_tcb(procfile->pid);
   if (tcb == NULL)
     {
-      ferr("ERROR: PID %d is not valid\n", (int)procfile->pid);
+      ferr("ERROR: PID %d is not valid\n", procfile->pid);
       return -ENODEV;
     }
 
@@ -1651,7 +1651,7 @@ static ssize_t proc_write(FAR struct file *filep, FAR const char *buffer,
   tcb = nxsched_get_tcb(procfile->pid);
   if (tcb == NULL)
     {
-      ferr("ERROR: PID %d is not valid\n", (int)procfile->pid);
+      ferr("ERROR: PID %d is not valid\n", procfile->pid);
       return -ENODEV;
     }
 
@@ -1780,7 +1780,7 @@ static int proc_opendir(FAR const char *relpath,
   tcb = nxsched_get_tcb(pid);
   if (tcb == NULL)
     {
-      ferr("ERROR: PID %d is not valid\n", (int)pid);
+      ferr("ERROR: PID %d is not valid\n", pid);
       return -ENOENT;
     }
 
@@ -1900,7 +1900,7 @@ static int proc_readdir(FAR struct fs_dirent_s *dir,
       tcb = nxsched_get_tcb(pid);
       if (tcb == NULL)
         {
-          ferr("ERROR: PID %d is no longer valid\n", (int)pid);
+          ferr("ERROR: PID %d is no longer valid\n", pid);
           return -ENOENT;
         }
 
@@ -2018,7 +2018,7 @@ static int proc_stat(const char *relpath, struct stat *buf)
   tcb = nxsched_get_tcb(pid);
   if (tcb == NULL)
     {
-      ferr("ERROR: PID %d is no longer valid\n", (int)pid);
+      ferr("ERROR: PID %d is no longer valid\n", pid);
       return -ENOENT;
     }
 
diff --git a/mm/mempool/mempool.c b/mm/mempool/mempool.c
index 2bdeb645451..061dbd5b388 100644
--- a/mm/mempool/mempool.c
+++ b/mm/mempool/mempool.c
@@ -506,7 +506,7 @@ void mempool_memdump(FAR struct mempool_s *pool,
 #  endif
 
               syslog(LOG_INFO, "%6d%12zu%12lu%*p%s\n",
-                     (int)buf->pid, blocksize, buf->seqno,
+                     buf->pid, blocksize, buf->seqno,
                      MM_PTR_FMT_WIDTH, ((FAR char *)buf - blocksize), tmp);
             }
         }
diff --git a/mm/mm_heap/mm_memdump.c b/mm/mm_heap/mm_memdump.c
index fdac302c464..3caa77fd0a7 100644
--- a/mm/mm_heap/mm_memdump.c
+++ b/mm/mm_heap/mm_memdump.c
@@ -85,7 +85,7 @@ static void memdump_handler(FAR struct mm_allocnode_s *node, FAR void *arg)
 #  endif
 
           syslog(LOG_INFO, "%6d%12zu%12lu%*p%s\n",
-                 (int)node->pid, nodesize, node->seqno,
+                 node->pid, nodesize, node->seqno,
                  MM_PTR_FMT_WIDTH,
                  ((FAR char *)node + SIZEOF_MM_ALLOCNODE), buf);
 #endif
diff --git a/mm/tlsf/mm_tlsf.c b/mm/tlsf/mm_tlsf.c
index b4bb8ad9479..bfe2e6cb94f 100644
--- a/mm/tlsf/mm_tlsf.c
+++ b/mm/tlsf/mm_tlsf.c
@@ -430,7 +430,7 @@ static void memdump_handler(FAR void *ptr, size_t size, int used,
 #  endif
 
          syslog(LOG_INFO, "%6d%12zu%12lu%*p%s\n",
-                (int)buf->pid, size, buf->seqno, MM_PTR_FMT_WIDTH,
+                buf->pid, size, buf->seqno, MM_PTR_FMT_WIDTH,
                 ptr, tmp);
 #endif
         }
diff --git a/sched/task/task_create.c b/sched/task/task_create.c
index 0118abe6c25..0cb209ae051 100644
--- a/sched/task/task_create.c
+++ b/sched/task/task_create.c
@@ -110,7 +110,7 @@ int nxthread_create(FAR const char *name, uint8_t ttype, int priority,
 
   nxtask_activate(&tcb->cmn);
 
-  return (int)pid;
+  return pid;
 }
 
 /****************************************************************************
diff --git a/sched/task/task_spawn.c b/sched/task/task_spawn.c
index bb011a38538..7c261286a00 100644
--- a/sched/task/task_spawn.c
+++ b/sched/task/task_spawn.c
@@ -129,7 +129,7 @@ static int nxtask_spawn_create(FAR const char *name, int priority,
 
   nxtask_activate(&tcb->cmn);
 
-  return (int)pid;
+  return pid;
 }
 
 /****************************************************************************
@@ -341,7 +341,7 @@ int task_spawn(FAR const char *name, main_t entry,
                           file_actions != NULL ? *file_actions : NULL,
                           attr, argv, envp);
 
-  return ret >= 0 ? (int)pid : ret;
+  return ret >= 0 ? pid : ret;
 }
 
 #endif /* CONFIG_BUILD_KERNEL */