diff --git a/webapp_post.py b/webapp_post.py
index 9cc8617a2..18ded1c34 100644
--- a/webapp_post.py
+++ b/webapp_post.py
@@ -138,10 +138,14 @@ def preparePostFromHtmlCache(nickname: str, postHtml: str, boxName: str,
     for keyIndex in range(10):
         keyStr = 'accesskey="' + str(keyIndex) + '"'
         if keyStr in withPageNumber:
-            withPageNumber = \
-                withPageNumber.replace(keyStr,
-                                       'accesskey="' +
-                                       str(accessKeyIndex) + '"')
+            if accessKeyIndex == 0 or accessKeyIndex > 9:
+                withPageNumber = \
+                    withPageNumber.replace(keyStr, '')
+            else:
+                withPageNumber = \
+                    withPageNumber.replace(keyStr,
+                                           'accesskey="' +
+                                           str(accessKeyIndex) + '"')
             break
     return prepareHtmlPostNickname(nickname, withPageNumber)