diff --git a/Userland/Libraries/LibCore/File.cpp b/Userland/Libraries/LibCore/File.cpp
index 64993d68fb..141163b354 100644
--- a/Userland/Libraries/LibCore/File.cpp
+++ b/Userland/Libraries/LibCore/File.cpp
@@ -153,11 +153,11 @@ bool File::exists(String const& filename)
     return stat(filename.characters(), &st) == 0;
 }
 
-Result<size_t, OSError> File::size(String const& filename)
+ErrorOr<size_t> File::size(String const& filename)
 {
     struct stat st;
     if (stat(filename.characters(), &st) < 0)
-        return OSError(errno);
+        return Error::from_errno(errno);
     return st.st_size;
 }
 
diff --git a/Userland/Libraries/LibCore/File.h b/Userland/Libraries/LibCore/File.h
index b36668785e..2ec2e8c0a4 100644
--- a/Userland/Libraries/LibCore/File.h
+++ b/Userland/Libraries/LibCore/File.h
@@ -35,7 +35,7 @@ public:
     static bool is_link(String const& filename);
 
     static bool exists(String const& filename);
-    static Result<size_t, OSError> size(String const& filename);
+    static ErrorOr<size_t> size(String const& filename);
     static bool ensure_parent_directories(String const& path);
     static String current_working_directory();
     static String absolute_path(String const& path);