diff --git a/pandoc-lua-engine/src/Text/Pandoc/Lua/Module/Pandoc.hs b/pandoc-lua-engine/src/Text/Pandoc/Lua/Module/Pandoc.hs
index 8fdfc3e20..4ad93dcbf 100644
--- a/pandoc-lua-engine/src/Text/Pandoc/Lua/Module/Pandoc.hs
+++ b/pandoc-lua-engine/src/Text/Pandoc/Lua/Module/Pandoc.hs
@@ -146,6 +146,7 @@ pushWithConstructorsSubtable constructors = do
 otherConstructors :: [DocumentedFunction PandocError]
 otherConstructors =
   [ mkAttr
+  , mkCaption
   , mkCell
   , mkAttributeList
   , mkCitation