diff --git a/Source/Engine/Serialization/JsonWriters.h b/Source/Engine/Serialization/JsonWriters.h
index cb0cce52f..836357ecf 100644
--- a/Source/Engine/Serialization/JsonWriters.h
+++ b/Source/Engine/Serialization/JsonWriters.h
@@ -32,6 +32,7 @@ public:
     }
 
 public:
+    using JsonWriter::Key;
 
     // [JsonWriter]
     void Key(const char* str, int32 length) override
diff --git a/Source/Engine/UI/GUI/Common/Slider.cs b/Source/Engine/UI/GUI/Common/Slider.cs
index e02b67ab2..8c7b022fe 100644
--- a/Source/Engine/UI/GUI/Common/Slider.cs
+++ b/Source/Engine/UI/GUI/Common/Slider.cs
@@ -390,7 +390,7 @@ public class Slider : ContainerControl
         }
 
         // Draw thumb
-        var thumbColorV = _isSliding ? ThumbColorSelected : (_mouseOverThumb ? ThumbColorHighlighted : ThumbColor);
+        var thumbColorV = _isSliding ? ThumbColorSelected : (_mouseOverThumb || IsNavFocused ? ThumbColorHighlighted : ThumbColor);
         if (ThumbBrush != null)
             ThumbBrush.Draw(_thumbRect, thumbColorV);
         else