diff --git a/src/directories.cpp b/src/directories.cpp
index a0b7ecc..510d327 100644
--- a/src/directories.cpp
+++ b/src/directories.cpp
@@ -702,11 +702,8 @@ void Directories::add_or_update_path(const boost::filesystem::path &dir_path, co
         grandchild->set_value(column_record.markup, Glib::Markup::escape_text("(empty)"));
         grandchild->set_value(column_record.type, PathType::unknown);
       }
-      else {
-        auto language = Source::guess_language(filename.first);
-        if(!language)
-          child->set_value(column_record.type, PathType::unknown);
-      }
+      else
+        child->set_value(column_record.type, Source::guess_language(filename.second) ? PathType::known : PathType::unknown);
     }
   }
   if(children.empty()) {