1 files changed, 2 insertions, 2 deletions
diff --git a/src/librustc_codegen_llvm/attributes.rs b/src/librustc_codegen_llvm/attributes.rs
index b15a64c966b..f26684d9ef0 100644
--- a/src/librustc_codegen_llvm/attributes.rs
+++ b/src/librustc_codegen_llvm/attributes.rs
@@ -321,12 +321,12 @@ pub fn provide(providers: &mut Providers<'_>) {
             // rustdoc needs to be able to document functions that use all the features, so
             // whitelist them all
             Lrc::new(llvm_util::all_known_features()
-                .map(|(a, b)| (a.to_string(), b.map(|s| s.to_string())))
+                .map(|(a, b)| (a.to_string(), b))
                 .collect())
         } else {
             Lrc::new(llvm_util::target_feature_whitelist(tcx.sess)
                 .iter()
-                .map(|&(a, b)| (a.to_string(), b.map(|s| s.to_string())))
+                .map(|&(a, b)| (a.to_string(), b))
                 .collect())
         }
     };