diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 6b0ae715a09..eefad294fab 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -91,11 +91,10 @@ config STANDARD_SERIAL
 
 config SERIAL_NPOLLWAITERS
 	int "Number of poll threads"
-	default 2
-	depends on STANDARD_SERIAL
+	default 4
 	---help---
 		Maximum number of threads than can be waiting for POLL events.
-		Default: 2
+		Default: 4
 
 config SERIAL_IFLOWCONTROL
 	bool
diff --git a/include/nuttx/serial/serial.h b/include/nuttx/serial/serial.h
index c258f189a1a..5d2435df4c8 100644
--- a/include/nuttx/serial/serial.h
+++ b/include/nuttx/serial/serial.h
@@ -45,7 +45,7 @@
 /* Maximum number of threads than can be waiting for POLL events */
 
 #ifndef CONFIG_SERIAL_NPOLLWAITERS
-#  define CONFIG_SERIAL_NPOLLWAITERS 2
+#  define CONFIG_SERIAL_NPOLLWAITERS 4
 #endif
 
 /* RX flow control */