diff --git a/src/libexpr/flake/config.cc b/src/libexpr/flake/config.cc
index 3c7ed5d8a..e0c5d4512 100644
--- a/src/libexpr/flake/config.cc
+++ b/src/libexpr/flake/config.cc
@@ -32,7 +32,7 @@ static void writeTrustedList(const TrustedList & trustedList)
 
 void ConfigFile::apply()
 {
-    std::set<std::string> whitelist{"bash-prompt", "bash-prompt-prefix", "bash-prompt-suffix", "flake-registry", "commit-lockfile-summary"};
+    std::set<std::string> whitelist{"bash-prompt", "bash-prompt-prefix", "bash-prompt-suffix", "flake-registry", "commit-lock-file-summary", "commit-lockfile-summary"};
 
     for (auto & [name, value] : settings) {
 
diff --git a/src/libfetchers/fetch-settings.hh b/src/libfetchers/fetch-settings.hh
index d085f0d82..50cd4d161 100644
--- a/src/libfetchers/fetch-settings.hh
+++ b/src/libfetchers/fetch-settings.hh
@@ -87,12 +87,12 @@ struct FetchSettings : public Config
         {}, true, Xp::Flakes};
 
     Setting<std::string> commitLockFileSummary{
-        this, "", "commit-lockfile-summary",
+        this, "", "commit-lock-file-summary",
         R"(
           The commit summary to use when committing changed flake lock files. If
           empty, the summary is generated based on the action performed.
         )",
-        {}, true, Xp::Flakes};
+        {"commit-lockfile-summary"}, true, Xp::Flakes};
 
     Setting<bool> trustTarballsFromGitForges{
         this, true, "trust-tarballs-from-git-forges",
diff --git a/src/nix/flake.md b/src/nix/flake.md
index d8b5bf435..661dd2f73 100644
--- a/src/nix/flake.md
+++ b/src/nix/flake.md
@@ -439,7 +439,7 @@ The following attributes are supported in `flake.nix`:
    - [`bash-prompt-prefix`](@docroot@/command-ref/conf-file.md#conf-bash-prompt-prefix)
    - [`bash-prompt-suffix`](@docroot@/command-ref/conf-file.md#conf-bash-prompt-suffix)
    - [`flake-registry`](@docroot@/command-ref/conf-file.md#conf-flake-registry)
-   - [`commit-lockfile-summary`](@docroot@/command-ref/conf-file.md#conf-commit-lockfile-summary)
+   - [`commit-lock-file-summary`](@docroot@/command-ref/conf-file.md#conf-commit-lock-file-summary)
 
 ## Flake inputs