diff --git a/core/modules/parsers/wikiparser/rules/codeblock.js b/core/modules/parsers/wikiparser/rules/codeblock.js
index 71efe2dfd..11681261b 100644
--- a/core/modules/parsers/wikiparser/rules/codeblock.js
+++ b/core/modules/parsers/wikiparser/rules/codeblock.js
@@ -57,7 +57,7 @@ exports.parse = function() {
 	}];
 };
 
-exports.getText = function(tree) {
+exports.serialize = function(tree) {
 	return "\n```" + tree.attributes.language.value + "\n" + tree.attributes.code.value + "\n```\n";
 }
 
diff --git a/core/modules/parsers/wikiparser/rules/horizrule.js b/core/modules/parsers/wikiparser/rules/horizrule.js
index 2e69e1986..697bd65a5 100644
--- a/core/modules/parsers/wikiparser/rules/horizrule.js
+++ b/core/modules/parsers/wikiparser/rules/horizrule.js
@@ -31,8 +31,8 @@ exports.parse = function() {
 	return [{type: "element", tag: "hr"}];
 };
 
-exports.getText = function() {
-	return "---";
+exports.serialize = function() {
+	return "\n---\n";
 }
 
 })();
diff --git a/core/modules/utils/parsetree.js b/core/modules/utils/parsetree.js
index d553ec4f0..ae548de0e 100644
--- a/core/modules/utils/parsetree.js
+++ b/core/modules/utils/parsetree.js
@@ -137,15 +137,15 @@ exports.serializeParseTree = function serializeParseTree(tree, tiddlerType) {
 			output.push(tree.text);
 		} else {
 			var Parser = $tw.wiki.getParser(tiddlerType);
-			var Rule = Parser.prototype.blockRuleClasses[tree.type] ||
-				Parser.prototype.inlineRuleClasses[tree.type] ||
-				Parser.prototype.pragmaRuleClasses[tree.type];
-			if(Rule && Rule.prototype.getText) {
-				output.push(Rule.prototype.getText(tree));
+			var Rule = Parser.prototype.blockRuleClasses[tree.rule] ||
+				Parser.prototype.inlineRuleClasses[tree.rule] ||
+				Parser.prototype.pragmaRuleClasses[tree.rule];
+			if(Rule && Rule.prototype.serialize) {
+				output.push(Rule.prototype.serialize(tree));
 			}
 		}
 		if(tree.children) {
-			return getParseTreeText(tree.children);
+			return serializeParseTree(tree.children);
 		}
 	}
 	return output.join("");