diff --git a/src/libstore/http-binary-cache-store.cc b/src/libstore/http-binary-cache-store.cc
index 945fe1834..738db132d 100644
--- a/src/libstore/http-binary-cache-store.cc
+++ b/src/libstore/http-binary-cache-store.cc
@@ -161,7 +161,7 @@ void HttpBinaryCacheStore::upsertFile(
     }
 }
 
-FileTransferRequest HttpBinaryCacheStore::makeRequest(const std::string & path)
+FileTransferRequest HttpBinaryCacheStore::makeRequest(std::string_view path)
 {
     /* Otherwise the last path fragment will get discarded. */
     auto cacheUriWithTrailingSlash = config->cacheUri;
diff --git a/src/libstore/include/nix/store/http-binary-cache-store.hh b/src/libstore/include/nix/store/http-binary-cache-store.hh
index d8ba72390..ecad09975 100644
--- a/src/libstore/include/nix/store/http-binary-cache-store.hh
+++ b/src/libstore/include/nix/store/http-binary-cache-store.hh
@@ -86,7 +86,7 @@ protected:
         const std::string & mimeType,
         uint64_t sizeHint) override;
 
-    FileTransferRequest makeRequest(const std::string & path);
+    FileTransferRequest makeRequest(std::string_view path);
 
     void getFile(const std::string & path, Sink & sink) override;