diff --git a/drivers/serial/serial_dma.c b/drivers/serial/serial_dma.c
index 0cab635f1eb..8572a47fd1a 100644
--- a/drivers/serial/serial_dma.c
+++ b/drivers/serial/serial_dma.c
@@ -353,7 +353,6 @@ void uart_recvchars_done(FAR uart_dev_t *dev)
   if (signo != 0)
     {
       nxsig_kill(dev->pid, signo);
-      uart_reset_sem(dev);
     }
 #endif
 }
diff --git a/drivers/serial/serial_io.c b/drivers/serial/serial_io.c
index 45ddcf36fd3..55160cee358 100644
--- a/drivers/serial/serial_io.c
+++ b/drivers/serial/serial_io.c
@@ -310,7 +310,6 @@ void uart_recvchars(FAR uart_dev_t *dev)
   if (signo != 0)
     {
       nxsig_kill(dev->pid, signo);
-      uart_reset_sem(dev);
     }
 #endif
 }