diff --git a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml
index 080754e0ef35..ccb9df705fb1 100644
--- a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml
+++ b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml
@@ -21,7 +21,7 @@ properties:
   "#address-cells":
     const: 1
     description: |
-      The cell is the slot ID if a function subnode is used.
+      The cell is the SDIO function number if a function subnode is used.
 
   "#size-cells":
     const: 0