diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc
index 7d45733f4..71a511c41 100644
--- a/src/libexpr/primops.cc
+++ b/src/libexpr/primops.cc
@@ -563,7 +563,7 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
 
     std::optional<std::string> outputHash;
     std::string outputHashAlgo;
-    FileIngestionMethod outputHashRecursive = FileIngestionMethod::Flat;
+    auto outputHashRecursive = FileIngestionMethod::Flat;
 
     StringSet outputs;
     outputs.insert("out");
diff --git a/src/nix-store/nix-store.cc b/src/nix-store/nix-store.cc
index 9a26eb57f..cde7d561b 100644
--- a/src/nix-store/nix-store.cc
+++ b/src/nix-store/nix-store.cc
@@ -174,7 +174,7 @@ static void opAdd(Strings opFlags, Strings opArgs)
    store. */
 static void opAddFixed(Strings opFlags, Strings opArgs)
 {
-    FileIngestionMethod recursive = FileIngestionMethod::Flat;
+    auto recursive = FileIngestionMethod::Flat;
 
     for (auto & i : opFlags)
         if (i == "--recursive") recursive = FileIngestionMethod::Recursive;
@@ -194,7 +194,7 @@ static void opAddFixed(Strings opFlags, Strings opArgs)
 /* Hack to support caching in `nix-prefetch-url'. */
 static void opPrintFixedPath(Strings opFlags, Strings opArgs)
 {
-    FileIngestionMethod recursive = FileIngestionMethod::Flat;
+    auto recursive = FileIngestionMethod::Flat;
 
     for (auto i : opFlags)
         if (i == "--recursive") recursive = FileIngestionMethod::Recursive;