diff --git a/plugin/filter/render.go b/plugin/filter/render.go
index 10eeac39e..0bd8fdb60 100644
--- a/plugin/filter/render.go
+++ b/plugin/filter/render.go
@@ -352,7 +352,7 @@ func (r *renderer) renderTagInList(values []ValueExpr) (renderResult, error) {
 		case DialectPostgres:
 			// Support hierarchical tags: match exact tag OR tags with this prefix
 			exactMatch := fmt.Sprintf("%s @> jsonb_build_array(%s::json)", jsonArrayExpr(r.dialect, field), r.addArg(fmt.Sprintf(`"%s"`, str)))
-			prefixMatch := fmt.Sprintf("%s::text LIKE %s::text", jsonArrayExpr(r.dialect, field), r.addArg(fmt.Sprintf(`%%"%s/%%`, str)))
+			prefixMatch := fmt.Sprintf("(%s)::text LIKE %s", jsonArrayExpr(r.dialect, field), r.addArg(fmt.Sprintf(`%%"%s/%%`, str)))
 			expr := fmt.Sprintf("(%s OR %s)", exactMatch, prefixMatch)
 			conditions = append(conditions, expr)
 		default:
diff --git a/store/db/postgres/memo_filter_test.go b/store/db/postgres/memo_filter_test.go
index 12045197a..50d94af42 100644
--- a/store/db/postgres/memo_filter_test.go
+++ b/store/db/postgres/memo_filter_test.go
@@ -18,12 +18,12 @@ func TestConvertExprToSQL(t *testing.T) {
 	}{
 		{
 			filter: `tag in ["tag1", "tag2"]`,
-			want:   "((memo.payload->'tags' @> jsonb_build_array($1::json) OR memo.payload->'tags'::text LIKE $2::text) OR (memo.payload->'tags' @> jsonb_build_array($3::json) OR memo.payload->'tags'::text LIKE $4::text))",
+			want:   "((memo.payload->'tags' @> jsonb_build_array($1::json) OR (memo.payload->'tags')::text LIKE $2) OR (memo.payload->'tags' @> jsonb_build_array($3::json) OR (memo.payload->'tags')::text LIKE $4))",
 			args:   []any{`"tag1"`, `%"tag1/%`, `"tag2"`, `%"tag2/%`},
 		},
 		{
 			filter: `!(tag in ["tag1", "tag2"])`,
-			want:   "NOT (((memo.payload->'tags' @> jsonb_build_array($1::json) OR memo.payload->'tags'::text LIKE $2::text) OR (memo.payload->'tags' @> jsonb_build_array($3::json) OR memo.payload->'tags'::text LIKE $4::text)))",
+			want:   "NOT (((memo.payload->'tags' @> jsonb_build_array($1::json) OR (memo.payload->'tags')::text LIKE $2) OR (memo.payload->'tags' @> jsonb_build_array($3::json) OR (memo.payload->'tags')::text LIKE $4)))",
 			args:   []any{`"tag1"`, `%"tag1/%`, `"tag2"`, `%"tag2/%`},
 		},
 		{
@@ -43,7 +43,7 @@ func TestConvertExprToSQL(t *testing.T) {
 		},
 		{
 			filter: `tag in ['tag1'] || content.contains('hello')`,
-			want:   "((memo.payload->'tags' @> jsonb_build_array($1::json) OR memo.payload->'tags'::text LIKE $2::text) OR memo.content ILIKE $3)",
+			want:   "((memo.payload->'tags' @> jsonb_build_array($1::json) OR (memo.payload->'tags')::text LIKE $2) OR memo.content ILIKE $3)",
 			args:   []any{`"tag1"`, `%"tag1/%`, "%hello%"},
 		},
 		{