diff --git a/Xamarin.Forms.Platform.Android/Forms.cs b/Xamarin.Forms.Platform.Android/Forms.cs
index b52f4c1d3..6ce33745b 100644
--- a/Xamarin.Forms.Platform.Android/Forms.cs
+++ b/Xamarin.Forms.Platform.Android/Forms.cs
@@ -549,9 +549,9 @@ namespace Xamarin.Forms
 			{
 				double myValue;
 
-				if (TryGetTextAppearance(themeDefault, out myValue))
+				if (TryGetTextAppearance(themeDefault, out myValue) && myValue > 0)
 					return myValue;
-				if (TryGetTextAppearance(deviceDefault, out myValue))
+				if (TryGetTextAppearance(deviceDefault, out myValue) && myValue > 0)
 					return myValue;
 				return defaultValue;
 			}