diff --git a/docs/types/reference-types.rst b/docs/types/reference-types.rst
index 7955c865e86a..8d21221b4323 100644
--- a/docs/types/reference-types.rst
+++ b/docs/types/reference-types.rst
@@ -505,7 +505,7 @@ Array slices are useful to ABI-decode secondary data passed in function paramete
         /// after doing basic validation on the address argument.
         function forward(bytes calldata _payload) external {
             bytes4 sig = bytes4(_payload[:4]);
-            // equivalent to
+            // Due to truncating behaviour, bytes4(_payload) performs identically.
             // bytes4 sig = bytes4(_payload);
             if (sig == bytes4(keccak256("setOwner(address)"))) {
                 address owner = abi.decode(_payload[4:], (address));