diff --git a/reid-lsp/src/analysis.rs b/reid-lsp/src/analysis.rs
index 6699908..3c4d5f8 100644
--- a/reid-lsp/src/analysis.rs
+++ b/reid-lsp/src/analysis.rs
@@ -1243,7 +1243,7 @@ pub fn analyze_expr(
                     .iter()
                     .map(|fun| Autocomplete {
                         text: fun.name.clone(),
-                        documentation: Some("intrinsic function documentation".to_string()),
+                        documentation: fun.documentation.clone(),
                         kind: AutocompleteKind::Function(fun.parameters.clone(), fun.return_type.clone()),
                     })
                     .collect::<Vec<_>>(),
diff --git a/reid-lsp/src/main.rs b/reid-lsp/src/main.rs
index d97abd2..4060272 100644
--- a/reid-lsp/src/main.rs
+++ b/reid-lsp/src/main.rs
@@ -152,10 +152,12 @@ impl LanguageServer for Backend {
                             })
                             .unwrap(),
                         );
-                        item.documentation = autocomplete
-                            .documentation
-                            .as_ref()
-                            .and_then(|d| Some(lsp_types::Documentation::String(d.clone())));
+                        item.documentation = autocomplete.documentation.as_ref().and_then(|d| {
+                            Some(lsp_types::Documentation::MarkupContent(MarkupContent {
+                                kind: MarkupKind::Markdown,
+                                value: d.clone(),
+                            }))
+                        });
                         item
                     })
                     .collect()