diff --git a/lib/optimize/ConcatenatedModule.js b/lib/optimize/ConcatenatedModule.js
index 9e8586d2ca9..a4e1ae4d8a7 100644
--- a/lib/optimize/ConcatenatedModule.js
+++ b/lib/optimize/ConcatenatedModule.js
@@ -1432,6 +1432,7 @@ class HarmonyExportImportedSpecifierDependencyConcatenatedTemplate {
 							-1,
 							`/* unused concated harmony import ${dep.name} */\n`
 						);
+						return;
 					}
 					let finalName;
 					const strictFlag = dep.originModule.buildMeta.strictHarmonyModule