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-rw-r--r--src/librustdoc/html/render/mod.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/librustdoc/html/render/mod.rs b/src/librustdoc/html/render/mod.rs
index 94171ad6de8..7e17f09aecd 100644
--- a/src/librustdoc/html/render/mod.rs
+++ b/src/librustdoc/html/render/mod.rs
@@ -223,7 +223,7 @@ pub(crate) struct IndexItemFunctionType {
     inputs: Vec<RenderType>,
     output: Vec<RenderType>,
     where_clause: Vec<Vec<RenderType>>,
-    param_names: Vec<Symbol>,
+    param_names: Vec<Option<Symbol>>,
 }
 
 impl IndexItemFunctionType {