diff --git a/src/Avalonia.Base/Media/Typeface.cs b/src/Avalonia.Base/Media/Typeface.cs
index 8363b824005..d9bd1588867 100644
--- a/src/Avalonia.Base/Media/Typeface.cs
+++ b/src/Avalonia.Base/Media/Typeface.cs
@@ -31,7 +31,7 @@ public Typeface(FontFamily fontFamily,
                 throw new ArgumentException("Font stretch must be > 1.");
             }
 
-            FontFamily = fontFamily;
+            FontFamily = fontFamily ?? FontFamily.Default;
             Style = style;
             Weight = weight;
             Stretch = stretch;