diff --git a/csharp/test/Apache.Arrow.IntegrationTest/JsonFile.cs b/csharp/test/Apache.Arrow.IntegrationTest/JsonFile.cs
index cb2f45d4c0f20..a75c4193da831 100644
--- a/csharp/test/Apache.Arrow.IntegrationTest/JsonFile.cs
+++ b/csharp/test/Apache.Arrow.IntegrationTest/JsonFile.cs
@@ -234,6 +234,7 @@ private static IArrowType ToDecimalArrowType(JsonArrowType type)
                 128 => new Decimal128Type(type.DecimalPrecision, type.Scale),
                 64 => new Decimal64Type(type.DecimalPrecision, type.Scale),
                 32 => new Decimal32Type(type.DecimalPrecision, type.Scale),
+                0 => new Decimal128Type(type.DecimalPrecision, type.Scale),
                 _ => throw new NotSupportedException($"Decimal type not supported. BitWidth: {type.BitWidth}"),
             };
         }