diff --git a/board/pandora/pandora.h b/board/pandora/pandora.h
index 5bfa0f9..f0ad16b 100644
--- a/board/pandora/pandora.h
+++ b/board/pandora/pandora.h
@@ -219,7 +219,8 @@
 	MUX_VAL(CP(UART2_RX),		(IEN  | PTD | EN  | M4)) /*GPIO_147,*/\
 								 /*UART2_RX*/\
  /*Serial Interface (Peripheral boot, Linux console, on AV connector)*/\
-	MUX_VAL(CP(UART3_RX_IRRX),	(IEN  | PTD | DIS | M0)) /*UART3_RX*/\
+ /*RX pulled up to avoid noise when nothing is connected to serial port*/\
+	MUX_VAL(CP(UART3_RX_IRRX),	(IEN  | PTU | EN  | M0)) /*UART3_RX*/\
 	MUX_VAL(CP(UART3_TX_IRTX),	(IDIS | PTD | DIS | M0)) /*UART3_TX*/\
  /*LEDs (Controlled by OMAP)*/\
 	MUX_VAL(CP(MMC1_DAT6),		(IDIS | PTD | DIS | M4)) /*GPIO_128*/\