diff --git a/docs/abi-spec.rst b/docs/abi-spec.rst
index 41967dd46..5273e0640 100644
--- a/docs/abi-spec.rst
+++ b/docs/abi-spec.rst
@@ -1,3 +1,4 @@
+/***/
 .. index:: abi, application binary interface
 
 .. _ABI: