diff --git a/drivers/serial/serial_dma.c b/drivers/serial/serial_dma.c
index 8572a47fd1a..87d0bcf5e90 100644
--- a/drivers/serial/serial_dma.c
+++ b/drivers/serial/serial_dma.c
@@ -352,7 +352,7 @@ void uart_recvchars_done(FAR uart_dev_t *dev)
 
   if (signo != 0)
     {
-      nxsig_kill(dev->pid, signo);
+      nxsig_tgkill(-1, dev->pid, signo);
     }
 #endif
 }
diff --git a/drivers/serial/serial_io.c b/drivers/serial/serial_io.c
index 55160cee358..8a75ae05594 100644
--- a/drivers/serial/serial_io.c
+++ b/drivers/serial/serial_io.c
@@ -309,7 +309,7 @@ void uart_recvchars(FAR uart_dev_t *dev)
 
   if (signo != 0)
     {
-      nxsig_kill(dev->pid, signo);
+      nxsig_tgkill(-1, dev->pid, signo);
     }
 #endif
 }