diff --git a/src/Avalonia.Visuals/Media/FontFamily.cs b/src/Avalonia.Visuals/Media/FontFamily.cs
index efb3c99143..771de524d9 100644
--- a/src/Avalonia.Visuals/Media/FontFamily.cs
+++ b/src/Avalonia.Visuals/Media/FontFamily.cs
@@ -200,7 +200,7 @@ namespace Avalonia.Media
                 return false;
             }
 
-            if (Key != other.Key)
+            if (!Equals(Key, other.Key))
             {
                 return false;
             }