diff --git a/examples/rp/src/bin/zerocopy.rs b/examples/rp/src/bin/zerocopy.rs
index 730a3ae0c..39f03c8e4 100644
--- a/examples/rp/src/bin/zerocopy.rs
+++ b/examples/rp/src/bin/zerocopy.rs
@@ -1,3 +1,6 @@
+//! This example shows how to use `zerocopy_channel` from `embassy_sync` for
+//! sending large values between two tasks without copying.
+//! The example also shows how to use the RP2040 ADC with DMA.
 #![no_std]
 #![no_main]