diff --git a/pkg/sql/logictest/testdata/logic_test/enums b/pkg/sql/logictest/testdata/logic_test/enums
index 05c10f1ac1d8..65e47e85c7ec 100644
--- a/pkg/sql/logictest/testdata/logic_test/enums
+++ b/pkg/sql/logictest/testdata/logic_test/enums
@@ -1090,7 +1090,7 @@ statement ok
 CREATE TABLE enum_data_type (x STRING);
 INSERT INTO enum_data_type VALUES ('notagreeting')
 
-statement error pq: invalid input value for enum greeting: "notagreeting"
+statement error pq: .*invalid input value for enum greeting: "notagreeting"
 ALTER TABLE enum_data_type ALTER COLUMN x SET DATA TYPE greeting USING x::greeting
 
 statement ok
diff --git a/pkg/sql/schemachanger/scbuild/internal/scbuildstmt/alter_table_alter_column_type.go b/pkg/sql/schemachanger/scbuild/internal/scbuildstmt/alter_table_alter_column_type.go
index 0bed230067e5..23b24519d040 100644
--- a/pkg/sql/schemachanger/scbuild/internal/scbuildstmt/alter_table_alter_column_type.go
+++ b/pkg/sql/schemachanger/scbuild/internal/scbuildstmt/alter_table_alter_column_type.go
@@ -284,14 +284,6 @@ func handleGeneralColumnConversion(
 			"old active version; ALTER COLUMN TYPE requires backfill. Reverting to legacy handling"))
 	}
 
-	// TODO(#132936): Not yet supported in the DSC. Throwing an error to trigger
-	// fallback to legacy.
-	if newColType.Type.Family() == types.EnumFamily {
-		panic(scerrors.NotImplementedErrorf(t,
-			"backfilling during ALTER COLUMN TYPE for an enum column "+
-				"type is not supported"))
-	}
-
 	// Generate the ID of the new column we are adding.
 	newColID := b.NextTableColumnID(tbl)
 	newColType.ColumnID = newColID
@@ -447,7 +439,7 @@ func getComputeExpressionForBackfill(
 		return
 	}
 
-	_, _, _, err = schemaexpr.DequalifyAndValidateExprImpl(b, expr, newColType.Type,
+	typedExpr, _, _, err := schemaexpr.DequalifyAndValidateExprImpl(b, expr, newColType.Type,
 		tree.AlterColumnTypeUsingExpr, b.SemaCtx(), volatility.Volatile, tn, b.ClusterSettings().Version.ActiveVersion(b),
 		func() colinfo.ResultColumns {
 			return getNonDropResultColumns(b, tableID)
@@ -456,6 +448,14 @@ func getComputeExpressionForBackfill(
 			return columnLookupFn(b, tableID, columnName)
 		},
 	)
+	if err != nil {
+		return
+	}
+
+	// Return the updated expression from DequalifyAndValidateExprImpl. For expressions
+	// involving user-defined types like enums, the types will be resolved to ensure
+	// they can be used during backfill.
+	expr, err = parser.ParseExpr(typedExpr)
 	return
 }