diff --git a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml b/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml
index 3248595dc93c3a44e9efbf13d3fee3e19da503bb..f04870d84542299014ca338cbe3cb87e0053a0ae 100644
--- a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml
+++ b/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml
@@ -85,4 +85,5 @@ examples:
                         <&pd IMX_SC_R_DSP_RAM>;
         mbox-names = "txdb0", "txdb1", "rxdb0", "rxdb1";
         mboxes = <&lsio_mu13 2 0>, <&lsio_mu13 2 1>, <&lsio_mu13 3 0>, <&lsio_mu13 3 1>;
+        memory-region = <&dsp_reserved>;
     };