diff --git a/Source/Utilities/Graphics/Text/GlyphCache.cs b/Source/Utilities/Graphics/Text/GlyphCache.cs
index d09b508f..1b943110 100644
--- a/Source/Utilities/Graphics/Text/GlyphCache.cs
+++ b/Source/Utilities/Graphics/Text/GlyphCache.cs
@@ -31,7 +31,7 @@ using System.Drawing;
 
 namespace OpenTK.Graphics.Text
 {
-    class GlyphCache// : IGlyphCache
+    class GlyphCache : IGlyphCache
     {
         #region Fields
 
@@ -56,7 +56,7 @@ namespace OpenTK.Graphics.Text
 
         #endregion
 
-        #region Public Members
+        #region IGlyphCache Members
 
         public void Add(Glyph glyph)
         {
diff --git a/Source/Utilities/Graphics/Text/IGlyphCache.cs b/Source/Utilities/Graphics/Text/IGlyphCache.cs
index d65c23c4..49195888 100644
--- a/Source/Utilities/Graphics/Text/IGlyphCache.cs
+++ b/Source/Utilities/Graphics/Text/IGlyphCache.cs
@@ -30,7 +30,7 @@ namespace OpenTK.Graphics.Text
     interface IGlyphCache
     {
         void Add(Glyph glyph);
-        void Contains(Glyph glyph);
+        bool Contains(Glyph glyph);
         CachedGlyphInfo this[Glyph glyph] { get; }
     }
 }