diff --git a/src/gtk318/widgets/_notebook.scss b/src/gtk318/widgets/_notebook.scss
--- a/src/gtk318/widgets/_notebook.scss
+++ b/src/gtk318/widgets/_notebook.scss
@@ -1,3 +1,5 @@
+@charset "UTF-8";
+
 /*****************
  * Notebooks and *
  * Tabs          *
diff --git a/src/gtk320/widgets/_treeview.scss b/src/gtk320/widgets/_treeview.scss
--- a/src/gtk320/widgets/_treeview.scss
+++ b/src/gtk320/widgets/_treeview.scss
@@ -1,4 +1,4 @@
-
+@charset "UTF-8";
 
 /**************
  * Tree Views *