diff --git a/lib/JavascriptParserHelpers.js b/lib/JavascriptParserHelpers.js
index 594522680..866404fed 100644
--- a/lib/JavascriptParserHelpers.js
+++ b/lib/JavascriptParserHelpers.js
@@ -58,7 +58,7 @@ exports.evaluateToIdentifier = (identifier, truthy) => {
 
 exports.expressionIsUnsupported = (parser, message) => {
 	return function unsupportedExpression(expr) {
-		const dep = new ConstDependency("(void 0)", expr.range, false);
+		const dep = new ConstDependency("(void 0)", expr.range, null);
 		dep.loc = expr.loc;
 		parser.state.current.addDependency(dep);
 		if (!parser.state.module) return;
diff --git a/lib/dependencies/HarmonyTopLevelThisParserPlugin.js b/lib/dependencies/HarmonyTopLevelThisParserPlugin.js
index d0bfb9de6..57c9c8868 100644
--- a/lib/dependencies/HarmonyTopLevelThisParserPlugin.js
+++ b/lib/dependencies/HarmonyTopLevelThisParserPlugin.js
@@ -16,7 +16,7 @@ class HarmonyTopLevelThisParserPlugin {
 				const module = parser.state.module;
 				const isHarmony = !!(module.buildMeta && module.buildMeta.exportsType);
 				if (isHarmony) {
-					const dep = new ConstDependency("undefined", node.range, false);
+					const dep = new ConstDependency("undefined", node.range, null);
 					dep.loc = node.loc;
 					parser.state.current.addDependency(dep);
 				}