diff --git a/src/backend/columnar/columnar_metadata.c b/src/backend/columnar/columnar_metadata.c
index 159c126f7..52b1082d7 100644
--- a/src/backend/columnar/columnar_metadata.c
+++ b/src/backend/columnar/columnar_metadata.c
@@ -655,10 +655,12 @@ SaveStripeSkipList(RelFileLocator relfilelocator, uint64 stripe,
 			{
 				values[Anum_columnar_chunk_minimum_value - 1] =
 					PointerGetDatum(DatumToBytea(chunk->minimumValue,
-												 Attr(tupleDescriptor, columnIndex)));
+												 TupleDescAttr(tupleDescriptor,
+															   columnIndex)));
 				values[Anum_columnar_chunk_maximum_value - 1] =
 					PointerGetDatum(DatumToBytea(chunk->maximumValue,
-												 Attr(tupleDescriptor, columnIndex)));
+												 TupleDescAttr(tupleDescriptor,
+															   columnIndex)));
 			}
 			else
 			{
@@ -816,9 +818,9 @@ ReadStripeSkipList(RelFileLocator relfilelocator, uint64 stripe,
 				datumArray[Anum_columnar_chunk_maximum_value - 1]);
 
 			chunk->minimumValue =
-				ByteaToDatum(minValue, Attr(tupleDescriptor, columnIndex));
+				ByteaToDatum(minValue, TupleDescAttr(tupleDescriptor, columnIndex));
 			chunk->maximumValue =
-				ByteaToDatum(maxValue, Attr(tupleDescriptor, columnIndex));
+				ByteaToDatum(maxValue, TupleDescAttr(tupleDescriptor, columnIndex));
 
 			chunk->hasMinMax = true;
 		}
diff --git a/src/backend/columnar/columnar_tableam.c b/src/backend/columnar/columnar_tableam.c
index 1158005c8..8e3796934 100644
--- a/src/backend/columnar/columnar_tableam.c
+++ b/src/backend/columnar/columnar_tableam.c
@@ -1012,7 +1012,7 @@ NeededColumnsList(TupleDesc tupdesc, Bitmapset *attr_needed)
 
 	for (int i = 0; i < tupdesc->natts; i++)
 	{
-		if (Attr(tupdesc, i)->attisdropped)
+		if (TupleDescAttr(tupdesc, i)->attisdropped)
 		{
 			continue;
 		}
@@ -1255,7 +1255,7 @@ LogRelationStats(Relation rel, int elevel)
 
 		for (uint32 column = 0; column < skiplist->columnCount; column++)
 		{
-			bool attrDropped = Attr(tupdesc, column)->attisdropped;
+			bool attrDropped = TupleDescAttr(tupdesc, column)->attisdropped;
 			for (uint32 chunk = 0; chunk < skiplist->chunkCount; chunk++)
 			{
 				ColumnChunkSkipNode *skipnode =
@@ -2638,7 +2638,7 @@ detoast_values(TupleDesc tupleDesc, Datum *orig_values, bool *isnull)
 
 	for (int i = 0; i < tupleDesc->natts; i++)
 	{
-		if (!isnull[i] && Attr(tupleDesc, i)->attlen == -1 &&
+		if (!isnull[i] && TupleDescAttr(tupleDesc, i)->attlen == -1 &&
 			VARATT_IS_EXTENDED(values[i]))
 		{
 			/* make a copy */
diff --git a/src/include/columnar/columnar_version_compat.h b/src/include/columnar/columnar_version_compat.h
index 0aaff6409..be5c3e379 100644
--- a/src/include/columnar/columnar_version_compat.h
+++ b/src/include/columnar/columnar_version_compat.h
@@ -25,12 +25,4 @@
 #define ExplainPropertyLong(qlabel, value, es) \
 	ExplainPropertyInteger(qlabel, NULL, value, es)
 
-
-/* tuple-descriptor attributes moved in PostgreSQL 18: */
-#if PG_VERSION_NUM >= PG_VERSION_18
-#define Attr(tupdesc, colno) TupleDescAttr((tupdesc), (colno))
-#else
-#define Attr(tupdesc, colno) (&((tupdesc)->attrs[(colno)]))
-#endif
-
 #endif /* COLUMNAR_COMPAT_H */