diff --git a/source/System/Text/StringBuilder.cs b/source/System/Text/StringBuilder.cs
index 0bb53282..2b8a85ea 100644
--- a/source/System/Text/StringBuilder.cs
+++ b/source/System/Text/StringBuilder.cs
@@ -364,7 +364,7 @@ public StringBuilder Append(long value)
         /// <returns>A reference to this instance after the append operation has completed.</returns>
         public StringBuilder Append(object value)
         {
-            return value == null ? this : Append(value);
+            return value == null ? this : Append(value.ToString());
         }
 
         /// <summary>