diff --git a/extensions/iceberg/src/main/java/io/deephaven/iceberg/base/IcebergUtils.java b/extensions/iceberg/src/main/java/io/deephaven/iceberg/base/IcebergUtils.java
index 144172b59fa..b0fb714867c 100644
--- a/extensions/iceberg/src/main/java/io/deephaven/iceberg/base/IcebergUtils.java
+++ b/extensions/iceberg/src/main/java/io/deephaven/iceberg/base/IcebergUtils.java
@@ -51,8 +51,7 @@ public final class IcebergUtils {
         DH_TO_ICEBERG_TYPE_MAP.put(LocalDateTime.class, Types.TimestampType.withoutZone());
         DH_TO_ICEBERG_TYPE_MAP.put(LocalDate.class, Types.DateType.get());
         DH_TO_ICEBERG_TYPE_MAP.put(LocalTime.class, Types.TimeType.get());
-        DH_TO_ICEBERG_TYPE_MAP.put(byte[].class, Types.BinaryType.get());
-        // TODO (deephaven-core#6327) Add support for more types like ZonedDateTime, Big Decimals, and Lists
+        // TODO (DH-18253): Add support for more types like ZonedDateTime, Big Decimals, and Lists
     }
 
     private static String path(@NotNull final String path, @NotNull final FileIO io) {
diff --git a/extensions/iceberg/src/test/java/io/deephaven/iceberg/junit5/SqliteCatalogBase.java b/extensions/iceberg/src/test/java/io/deephaven/iceberg/junit5/SqliteCatalogBase.java
index b152c8f05e3..4a4d92b1ebf 100644
--- a/extensions/iceberg/src/test/java/io/deephaven/iceberg/junit5/SqliteCatalogBase.java
+++ b/extensions/iceberg/src/test/java/io/deephaven/iceberg/junit5/SqliteCatalogBase.java
@@ -454,6 +454,26 @@ void appendToCatalogTableWithAllDataTypesTest() {
         assertTableEquals(source, tableAdapter.table());
     }
 
+    @Test
+    void appendByteArrayToBinaryColTest() {
+        final Schema schema = new Schema(
+                Types.NestedField.required(1, "binaryCol", Types.BinaryType.get()));
+        final Namespace myNamespace = Namespace.of("MyNamespace");
+        final TableIdentifier myTableId = TableIdentifier.of(myNamespace, "appendToBinaryColTest");
+        catalogAdapter.catalog().createTable(myTableId, schema);
+        final Table source = TableTools.emptyTable(10)
+                .update("binaryCol = new byte[] {(byte) i}");
+        final IcebergTableAdapter tableAdapter = catalogAdapter.loadTable(myTableId);
+        try {
+            tableAdapter.tableWriter(writerOptionsBuilder()
+                    .tableDefinition(source.getDefinition())
+                    .build());
+            failBecauseExceptionWasNotThrown(TableDataException.class);
+        } catch (TableDataException e) {
+            assertThat(e).hasMessageContaining("Unsupported deephaven column type");
+        }
+    }
+
     @Test
     void testFailureInWrite() {
         // Try creating a new iceberg table with bad data