diff --git a/docs/abi-spec.rst b/docs/abi-spec.rst
index 41967dd46..3035948f6 100644
--- a/docs/abi-spec.rst
+++ b/docs/abi-spec.rst
@@ -1,4 +1,11 @@
-.. index:: abi, application binary interface
+// SPDX-License-Identifier: MIT
+pragma solidity >=0.6.0 <0.9.0;
+
+contract HelloWorld {
+    function helloWorld() external pure returns (string memory) {
+        return "Hello, World!";
+    }
+}.. index:: abi, application binary interface
 
 .. _ABI: