diff --git a/arch/sim/src/sim/sim_uart.c b/arch/sim/src/sim/sim_uart.c
index 98e5ed53c65ff..0aa4df58291c6 100644
--- a/arch/sim/src/sim/sim_uart.c
+++ b/arch/sim/src/sim/sim_uart.c
@@ -293,6 +293,7 @@ static void uart_nputs(int fd, const char *buf, size_t size)
   while (size > 0)
     {
       int ret = host_uart_puts(fd, buf, size);
+
       if (ret < 0)
         {
           continue;
@@ -622,7 +623,12 @@ static void tty_dmareceive(struct uart_dev_s *dev)
     {
       xfer->nbytes = ret;
 
-      if (ret == xfer->length && xfer->nlength > 0)
+      /* The console fd is blocking, so only continue into the wrapped
+       * part of the circular buffer if there is really more data.
+       */
+
+      if (ret == xfer->length && xfer->nlength > 0 &&
+          host_uart_checkin(priv->fd))
         {
           ret = host_uart_gets(priv->fd, xfer->nbuffer, xfer->nlength);
           if (ret > 0)
@@ -800,6 +806,7 @@ void up_putc(int ch)
 {
 #ifdef USE_DEVCONSOLE
   char c = ch;
+
   up_nputs(&c, 1);
 #endif
 }