diff --git a/Userland/Libraries/LibCore/ConfigFile.cpp b/Userland/Libraries/LibCore/ConfigFile.cpp
index 525d215494b..aed8a1e7159 100644
--- a/Userland/Libraries/LibCore/ConfigFile.cpp
+++ b/Userland/Libraries/LibCore/ConfigFile.cpp
@@ -45,7 +45,7 @@ NonnullRefPtr<ConfigFile> ConfigFile::open(String const& filename, int fd)
     return adopt_ref(*new ConfigFile(filename, fd));
 }
 
-ConfigFile::ConfigFile(const String& filename, AllowWriting allow_altering)
+ConfigFile::ConfigFile(String const& filename, AllowWriting allow_altering)
     : m_file(File::construct(filename))
 {
     if (!m_file->open(allow_altering == AllowWriting::Yes ? OpenMode::ReadWrite : OpenMode::ReadOnly))