diff --git a/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt b/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt
index 997baeaa869baa6f98f4376f6db2c07f0b170578..7a0e15053db97481dbdd22b5bb56c134870210f1 100644
--- a/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt
+++ b/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt
@@ -78,6 +78,8 @@ Optional properties:
   - dma-names: Must contain a list of two DMA names, "tx" and "rx".
   - {cts,dsr,dcd,rng,rts,dtr}-gpios: Specify GPIOs for modem lines, cfr. the
     generic serial DT bindings in serial.txt.
+  - uart-has-rtscts: Indicates dedicated lines for RTS/CTS hardware flow
+    control, cfr. the generic serial DT bindings in serial.txt.
 
 Example:
 	aliases {