diff --git a/QuestPDF/Elements/Text/FontFallback.cs b/QuestPDF/Elements/Text/FontFallback.cs
index e9acbfd..2e19bdd 100644
--- a/QuestPDF/Elements/Text/FontFallback.cs
+++ b/QuestPDF/Elements/Text/FontFallback.cs
@@ -121,7 +121,7 @@ namespace QuestPDF.Elements.Text
         {
             foreach (var textBlockItem in textBlockItems)
             {
-                if (textBlockItem is TextBlockSpan textBlockSpan)
+                if (textBlockItem is TextBlockSpan textBlockSpan and not TextBlockPageNumber)
                 {
                     // perform font-fallback operation only when any fallback is available
                     if (textBlockSpan.Style.Fallback == null)
diff --git a/QuestPDF/Fluent/TextExtensions.cs b/QuestPDF/Fluent/TextExtensions.cs
index 92ae7c6..fba270d 100644
--- a/QuestPDF/Fluent/TextExtensions.cs
+++ b/QuestPDF/Fluent/TextExtensions.cs
@@ -36,6 +36,7 @@ namespace QuestPDF.Fluent
         internal TextPageNumberDescriptor(Action<TextStyle> assignTextStyle, Action<PageNumberFormatter> assignFormatFunction) : base(assignTextStyle)
         {
             AssignFormatFunction = assignFormatFunction;
+            AssignFormatFunction(x => x?.ToString());
         }
 
         public TextPageNumberDescriptor Format(PageNumberFormatter formatter)