diff --git a/src/librustdoc/formats/cache.rs b/src/librustdoc/formats/cache.rs
index 39b750279ac5..ff19df7fb366 100644
--- a/src/librustdoc/formats/cache.rs
+++ b/src/librustdoc/formats/cache.rs
@@ -249,7 +249,7 @@ impl DocFolder for Cache {
                     self.implementors
                         .entry(did)
                         .or_default()
-                        .push(Impl { impl_item: item.clone() });
+                        .push(Impl { inner: item.clone() });
                 }
             }
         }
@@ -454,7 +454,7 @@ impl DocFolder for Cache {
             } else {
                 unreachable!()
             };
-            let impl_item = Impl { impl_item: item };
+            let impl_item = Impl { inner: item };
             if impl_item.trait_did().map_or(true, |d| self.traits.contains_key(&d)) {
                 for did in dids {
                     self.impls.entry(did).or_insert(vec![]).push(impl_item.clone());
diff --git a/src/librustdoc/formats/mod.rs b/src/librustdoc/formats/mod.rs
index 55fd4948f452..be0381948077 100644
--- a/src/librustdoc/formats/mod.rs
+++ b/src/librustdoc/formats/mod.rs
@@ -27,15 +27,12 @@ crate enum RenderMode {
 /// Metadata about implementations for a type or trait.
 #[derive(Clone, Debug)]
 crate struct Impl {
-    crate impl_item: clean::Item,
+    crate inner: clean::Impl,
 }
 
 impl Impl {
     crate fn inner_impl(&self) -> &clean::Impl {
-        match self.impl_item.kind {
-            clean::ImplItem(ref impl_) => impl_,
-            _ => panic!("non-impl item found in impl"),
-        }
+        &self.inner
     }
 
     crate fn trait_did(&self) -> Option<DefId> {