diff --git a/python/deltalake/schema.py b/python/deltalake/schema.py
index 8b4ceb7651..2f89cfaa2d 100644
--- a/python/deltalake/schema.py
+++ b/python/deltalake/schema.py
@@ -54,7 +54,7 @@ def dtype_to_delta_dtype(dtype: pa.DataType) -> pa.DataType:
             return pa.timestamp(
                 "us"
             )  # TODO(ion): propagate also timezone information during writeonce we can properly read TZ in delta schema
-        elif isinstance(dtype, pa.FixedSizeBinaryType):
+        elif type(dtype) is pa.FixedSizeBinaryType:
             return pa.binary()
         try:
             return dtype_map[dtype]
diff --git a/python/tests/test_schema.py b/python/tests/test_schema.py
index faaf8f5897..7721774d21 100644
--- a/python/tests/test_schema.py
+++ b/python/tests/test_schema.py
@@ -236,6 +236,7 @@ def test_delta_schema():
                     pa.field("some_int", pa.uint32(), nullable=True),
                     pa.field("some_string", pa.string(), nullable=False),
                     pa.field("some_fixed_binary", pa.binary(5), nullable=False),
+                    pa.field("some_decimal", pa.decimal128(10, 2), nullable=False),
                 ]
             ),
             pa.schema(
@@ -243,6 +244,7 @@ def test_delta_schema():
                     pa.field("some_int", pa.int32(), nullable=True),
                     pa.field("some_string", pa.string(), nullable=False),
                     pa.field("some_fixed_binary", pa.binary(), nullable=False),
+                    pa.field("some_decimal", pa.decimal128(10, 2), nullable=False),
                 ]
             ),
             False,