diff --git a/flow/connectors/postgres/normalize_stmt_generator.go b/flow/connectors/postgres/normalize_stmt_generator.go
index 9c292ef252..3f38dfb9c9 100644
--- a/flow/connectors/postgres/normalize_stmt_generator.go
+++ b/flow/connectors/postgres/normalize_stmt_generator.go
@@ -192,10 +192,9 @@ func (n *normalizeStmtGenerator) generateUpdateStatements(quotedCols []string) [
 	}())
 
 	for _, cols := range n.unchangedToastColumns {
-		unquotedUnchangedColsArray := strings.Split(cols, ",")
-		unchangedColsArray := make([]string, 0, len(unquotedUnchangedColsArray))
-		for _, unchangedToastCol := range unquotedUnchangedColsArray {
-			unchangedColsArray = append(unchangedColsArray, QuoteIdentifier(unchangedToastCol))
+		unchangedColsArray := strings.Split(cols, ",")
+		for i, unchangedToastCol := range unchangedColsArray {
+			unchangedColsArray[i] = QuoteIdentifier(unchangedToastCol)
 		}
 		otherCols := utils.ArrayMinus(quotedCols, unchangedColsArray)
 		tmpArray := make([]string, 0, len(otherCols))