diff --git a/src/dom/select.c b/src/dom/select.c
index 8e074953..1c53f61c 100644
--- a/src/dom/select.c
+++ b/src/dom/select.c
@@ -530,7 +530,7 @@ init_dom_select(enum dom_select_syntax syntax, struct dom_string *string)
 	struct dom_stack stack;
 	enum dom_exception_code code;
 
-	init_dom_stack(&stack, DOM_STACK_KEEP_NODES);
+	init_dom_stack(&stack, DOM_STACK_FLAG_NONE);
 	add_dom_stack_tracer(&stack, "init-select: ");
 
 	code = parse_dom_select(select, &stack, string);
@@ -1060,12 +1060,12 @@ select_dom_nodes(struct dom_select *select, struct dom_node *root)
 
 	select_data.select = select;;
 
-	init_dom_stack(&stack, DOM_STACK_KEEP_NODES);
+	init_dom_stack(&stack, DOM_STACK_FLAG_NONE);
 	add_dom_stack_context(&stack, &select_data,
 			      &dom_select_context_info);
 	add_dom_stack_tracer(&stack, "select-tree: ");
 
-	init_dom_stack(&select_data.stack, DOM_STACK_KEEP_NODES);
+	init_dom_stack(&select_data.stack, DOM_STACK_FLAG_NONE);
 	add_dom_stack_context(&select_data.stack, &select_data,
 			      &dom_select_data_context_info);
 	add_dom_stack_tracer(&select_data.stack, "select-match: ");
diff --git a/src/dom/sgml/parser.c b/src/dom/sgml/parser.c
index d0f69f94..594a927d 100644
--- a/src/dom/sgml/parser.c
+++ b/src/dom/sgml/parser.c
@@ -557,8 +557,8 @@ init_sgml_parser(enum sgml_parser_type type, enum sgml_document_type doctype,
 	parser->flags = flags;
 	parser->info  = get_sgml_info(doctype);
 
-	if (type == SGML_PARSER_TREE)
-		stack_flags |= DOM_STACK_KEEP_NODES;
+	if (type == SGML_PARSER_STREAM)
+		stack_flags |= DOM_STACK_FLAG_FREE_NODES;
 
 	init_dom_stack(&parser->stack, stack_flags);
 	/* FIXME: Some sgml backend specific callbacks? Handle HTML script tags,
diff --git a/src/dom/stack.c b/src/dom/stack.c
index b3f9c47b..f41c1cb7 100644
--- a/src/dom/stack.c
+++ b/src/dom/stack.c
@@ -213,7 +213,7 @@ pop_dom_node(struct dom_stack *stack)
 
 	call_dom_stack_callbacks(stack, state, DOM_STACK_POP);
 
-	if (!(stack->flags & DOM_STACK_KEEP_NODES))
+	if (stack->flags & DOM_STACK_FLAG_FREE_NODES)
 		done_dom_node(state->node);
 
 	stack->depth--;
diff --git a/src/dom/stack.h b/src/dom/stack.h
index 3086ae38..e48db2f7 100644
--- a/src/dom/stack.h
+++ b/src/dom/stack.h
@@ -48,8 +48,10 @@ struct dom_stack_context {
 };
 
 enum dom_stack_flag {
-	/* Keep nodes when popping them or call done_dom_node() on them. */
-	DOM_STACK_KEEP_NODES = 1,
+	DOM_STACK_FLAG_NONE = 0,
+
+	/* Free nodes when popping them by calling done_dom_node(). */
+	DOM_STACK_FLAG_FREE_NODES = 1,
 };
 
 /* The DOM stack is a convenient way to traverse DOM trees. Also it