diff --git a/cpp/src/parquet/properties.h b/cpp/src/parquet/properties.h
index 5b70e0b2001fd..4d3acb491e390 100644
--- a/cpp/src/parquet/properties.h
+++ b/cpp/src/parquet/properties.h
@@ -1180,10 +1180,4 @@ struct ArrowWriteContext {
 PARQUET_EXPORT
 std::shared_ptr<ArrowWriterProperties> default_arrow_writer_properties();
 
-// PLAIN_DICTIONARY is deprecated but used to be used as a dictionary index
-// encoding.
-constexpr bool IsDictionaryIndexEncoding(Encoding::type e) {
-  return e == Encoding::RLE_DICTIONARY || e == Encoding::PLAIN_DICTIONARY;
-}
-
 }  // namespace parquet
diff --git a/cpp/src/parquet/types.h b/cpp/src/parquet/types.h
index 38529bceae85f..70a1c4b73ec45 100644
--- a/cpp/src/parquet/types.h
+++ b/cpp/src/parquet/types.h
@@ -811,4 +811,10 @@ PARQUET_EXPORT SortOrder::type GetSortOrder(ConvertedType::type converted,
 PARQUET_EXPORT SortOrder::type GetSortOrder(
     const std::shared_ptr<const LogicalType>& logical_type, Type::type primitive);
 
+// PLAIN_DICTIONARY is deprecated but used to be used as a dictionary index
+// encoding.
+constexpr bool IsDictionaryIndexEncoding(Encoding::type e) {
+  return e == Encoding::RLE_DICTIONARY || e == Encoding::PLAIN_DICTIONARY;
+}
+
 }  // namespace parquet