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diff --git a/meta-raspberrypi/docs/extra-build-config.md b/meta-raspberrypi/docs/extra-build-config.md
index 84601848ef..586ee6c6ad 100644
--- a/meta-raspberrypi/docs/extra-build-config.md
+++ b/meta-raspberrypi/docs/extra-build-config.md
@@ -269,6 +269,15 @@ local.conf:
ENABLE_DWC2_PERIPHERAL = "1"
+## Enable USB host support
+
+By default in case of the Compute Module 4 IO Board the standard USB driver
+that usually supports host mode operations is disabled for power saving reasons.
+Users who want to use the 2 USB built-in ports or the other ports provided via
+the header extension should set the following in local.conf:
+
+ ENABLE_DWC2_HOST = "1"
+
## Enable Openlabs 802.15.4 radio module
When using device tree kernels, set this variable to enable the 802.15.4 hat: