diff --git a/plugins/exporter.koplugin/target/memos.lua b/plugins/exporter.koplugin/target/memos.lua
index 01ed6ec3b..f6521bb8b 100644
--- a/plugins/exporter.koplugin/target/memos.lua
+++ b/plugins/exporter.koplugin/target/memos.lua
@@ -135,7 +135,7 @@ function MemosExporter:createHighlights(booknotes)
             if clipping.note then
                 highlight = highlight .. clipping.note .. "\n\n"
             end
-            highlight =  highlight .. booknotes.title .. " (page: " .. clipping.page .. "）\n\n #" .. booknotes.title .. " #koreader"
+            highlight =  highlight .. booknotes.title .. " (page: " .. clipping.page .. "）\n\n #" .. booknotes.title:gsub("%s+", "_") .. " #koreader"
             local result, err = makeRequest("POST", { content = highlight }, self.settings.api, self.settings.token)
             if not result then
                 logger.warn("error creating highlights", err)