diff --git a/java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/projectRoot/ConvertToRepositoryLibraryActionBase.kt b/java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/projectRoot/ConvertToRepositoryLibraryActionBase.kt
index 3454abf24a98..eb728571756d 100644
--- a/java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/projectRoot/ConvertToRepositoryLibraryActionBase.kt
+++ b/java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/projectRoot/ConvertToRepositoryLibraryActionBase.kt
@@ -258,7 +258,7 @@ private class ComparingJarFilesTask(project: Project, private val downloadedFile
     }
     else if (file.fileType == StdFileTypes.ARCHIVE) {
       val jarRootUrl = VfsUtil.getUrlForLibraryRoot(VfsUtil.virtualToIoFile(file))
-      result.add(VirtualFileManager.getInstance().refreshAndFindFileByUrl(jarRootUrl)!!)
+      VirtualFileManager.getInstance().refreshAndFindFileByUrl(jarRootUrl)?.let { result.add(it) }
     }
   }