diff --git a/drivers/serial/serial_dma.c b/drivers/serial/serial_dma.c
index 1e5f0df55f0..d4b86600915 100644
--- a/drivers/serial/serial_dma.c
+++ b/drivers/serial/serial_dma.c
@@ -354,7 +354,7 @@ void uart_recvchars_done(FAR uart_dev_t *dev)
 
   if (signo != 0)
     {
-      nxsig_tgkill(-1, dev->pid, signo);
+      nxsig_kill(dev->pid, signo);
     }
 #endif
 }
diff --git a/drivers/serial/serial_io.c b/drivers/serial/serial_io.c
index 54f4542d8d5..c88875a1342 100644
--- a/drivers/serial/serial_io.c
+++ b/drivers/serial/serial_io.c
@@ -311,7 +311,7 @@ void uart_recvchars(FAR uart_dev_t *dev)
 
   if (signo != 0)
     {
-      nxsig_tgkill(-1, dev->pid, signo);
+      nxsig_kill(dev->pid, signo);
     }
 #endif
 }