diff --git a/l3config.js b/l3config.js
index a3cf261..e6a8b92 100644
--- a/l3config.js
+++ b/l3config.js
@@ -62,19 +62,18 @@ class L3Section {
 			.filter(option => !!option);
 
 		if (options.length == 0) {
-			return undefined
+			return undefined;
 		}
 
-		var compiledopts = {};
+		var compiledopts = new Map();
 		for (const option of options) {
-			if (!compiledopts[option.optionName]) {
-				compiledopts[option.optionName] = [];
-			}
-			compiledopts[option.optionName].push(option.value)
+			let c = compiledopts.get(option.optionName) ?? [];
+			c.push(option.value);
+			compiledopts.set(option.optionName, c);
 		}
 
 		let optstrs = [];
-		for (const [opt, values] of Object.entries(compiledopts)) {
+		for (const [opt, values] of compiledopts) {
 			if (values.length == 1) {
 				optstrs.push(`option ${opt} '${values[0]}'`);
 			} else {