diff --git a/VpSharp/src/Coordinates.cs b/VpSharp/src/Coordinates.cs
index 24bca7a..04c1608 100644
--- a/VpSharp/src/Coordinates.cs
+++ b/VpSharp/src/Coordinates.cs
@@ -216,7 +216,7 @@ public readonly partial struct Coordinates : IEquatable<Coordinates>, IFormattab
     /// <returns>A <see cref="string" /> representation of these coordinates.</returns>
     public string ToString(string? format, IFormatProvider? formatProvider = null)
     {
-        format ??= "{0}";
+        format ??= "0";
         return Serializer.Serialize(this, format, formatProvider ?? CultureInfo.InvariantCulture);
     }
 }