diff --git a/nshlib/nsh_dbgcmds.c b/nshlib/nsh_dbgcmds.c
index 811a5773e..e9d6d9dab 100644
--- a/nshlib/nsh_dbgcmds.c
+++ b/nshlib/nsh_dbgcmds.c
@@ -114,7 +114,7 @@ int mem_parse(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv,
 
   /* Get the address to be accessed */
 
-  mem->dm_addr = (void*)strtol(argv[1], NULL, 16);
+  mem->dm_addr = (void*)((uintptr_t)strtol(argv[1], NULL, 16));
 
   /* Get the number of bytes to access */
 
@@ -332,11 +332,11 @@ void nsh_dumpbuffer(FAR struct nsh_vtbl_s *vtbl, const char *msg,
 #ifndef CONFIG_NSH_DISABLE_XD
 int cmd_xd(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
 {
-  char  *addr;
-  char  *endptr;
-  int    nbytes;
+  FAR char *addr;
+  FAR char *endptr;
+  int       nbytes;
 
-  addr = (char*)strtol(argv[1], &endptr, 16);
+  addr = (char*)((uintptr_t)strtol(argv[1], &endptr, 16));
   if (argv[0][0] == '\0' || *endptr != '\0')
     {
       return ERROR;
diff --git a/nshlib/nsh_ddcmd.c b/nshlib/nsh_ddcmd.c
index 404b484a8..11652fe7e 100644
--- a/nshlib/nsh_ddcmd.c
+++ b/nshlib/nsh_ddcmd.c
@@ -455,7 +455,6 @@ static inline int dd_outfopen(const char *name, struct dd_s *dd)
   DD_OUTFD = open(name, O_WRONLY|O_CREAT|O_TRUNC, 0644);
   if (DD_OUTFD < 0)
     {
-      FAR struct nsh_vtbl_s *vtbl = dd->vtbl;
       nsh_output(dd->vtbl, g_fmtcmdfailed, g_dd, "open", NSH_ERRNO);
       return ERROR;
     }
diff --git a/nshlib/nsh_proccmds.c b/nshlib/nsh_proccmds.c
index 8ae201123..c0dc1713f 100644
--- a/nshlib/nsh_proccmds.c
+++ b/nshlib/nsh_proccmds.c
@@ -112,7 +112,9 @@ static const char *g_ttypenames[4] =
 static void ps_task(FAR _TCB *tcb, FAR void *arg)
 {
   struct nsh_vtbl_s *vtbl = (struct nsh_vtbl_s*)arg;
+#if CONFIG_MAX_TASK_ARGS > 2
   int i;
+#endif
 
   /* Show task status */
 
@@ -159,9 +161,9 @@ static void ps_task(FAR _TCB *tcb, FAR void *arg)
 int cmd_exec(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
 {
   char *endptr;
-  long addr;
+  uintptr_t addr;
 
-  addr = strtol(argv[1], &endptr, 0);
+  addr = (uintptr_t)strtol(argv[1], &endptr, 0);
   if (!addr || endptr == argv[1] || *endptr != '\0')
     {
        nsh_output(vtbl, g_fmtarginvalid, argv[0]);