diff --git a/platform/platform-impl/src/com/intellij/ide/actions/project/convertModuleGroupsToQualifiedNames.kt b/platform/platform-impl/src/com/intellij/ide/actions/project/convertModuleGroupsToQualifiedNames.kt
index 334f06314e3c..d788b8867d63 100644
--- a/platform/platform-impl/src/com/intellij/ide/actions/project/convertModuleGroupsToQualifiedNames.kt
+++ b/platform/platform-impl/src/com/intellij/ide/actions/project/convertModuleGroupsToQualifiedNames.kt
@@ -162,6 +162,7 @@ class ConvertModuleGroupsToQualifiedNamesDialog(val project: Project) : DialogWr
       if (rememberOldNamesCheckBox.isSelected) {
         (ModulePointerManager.getInstance(project) as ModulePointerManagerImpl).setRenamingScheme(renamingScheme)
       }
+      project.save()
     }
 
     super.doOKAction()