diff --git a/source/blender/windowmanager/intern/wm_files.cc b/source/blender/windowmanager/intern/wm_files.cc
index bb3b6474c3e..17804679f86 100644
--- a/source/blender/windowmanager/intern/wm_files.cc
+++ b/source/blender/windowmanager/intern/wm_files.cc
@@ -3180,10 +3180,16 @@ void WM_OT_open_mainfile(wmOperatorType *ot)
 
 static int wm_revert_mainfile_invoke(bContext *C, wmOperator *op, const wmEvent * /*event*/)
 {
+  std::string message = IFACE_("Any unsaved changes will be lost.");
+  if (ED_image_should_save_modified(CTX_data_main(C))) {
+    message += "\n";
+    message += IFACE_("Warning: There are unsaved external image(s).");
+  }
+
   return WM_operator_confirm_ex(C,
                                 op,
                                 IFACE_("Revert to the Saved File"),
-                                IFACE_("Any unsaved changes will be lost."),
+                                message.c_str(),
                                 IFACE_("Revert"),
                                 ALERT_ICON_WARNING,
                                 false);