diff --git a/otterwiki/templates/create.html b/otterwiki/templates/create.html
index a2ef031..9396f64 100644
--- a/otterwiki/templates/create.html
+++ b/otterwiki/templates/create.html
@@ -13,7 +13,7 @@
     </div>
     <div style="position: relative; -ms-flex: 1 1 0%; flex: 1 1 0%; min-width: 0;">
     {% for prefix in pagename_prefixes %}
-    <button class="btn btn-xsm mb-5 mr-5" onclick="return otterwiki.toggle_pagename_prefix('pagename','{{prefix}}')">{{prefix}}/</button>
+    <button type="button" class="btn btn-xsm mb-5 mr-5" onclick="return otterwiki.toggle_pagename_prefix('pagename','{{prefix}}')">{{prefix}}/</button>
     {% endfor %}
     </div>
   </div>
diff --git a/otterwiki/templates/rename.html b/otterwiki/templates/rename.html
index 8e40617..a36360a 100644
--- a/otterwiki/templates/rename.html
+++ b/otterwiki/templates/rename.html
@@ -67,7 +67,7 @@
     </div>
     <div style="position: relative; -ms-flex: 1 1 0%; flex: 1 1 0%; min-width: 0;">
     {% for prefix in pagename_prefixes %}
-    <button class="btn btn-xsm mb-5 mr-5" onclick="return otterwiki.toggle_pagename_prefix('new_pagename','{{prefix}}')">{{prefix}}/</button>
+    <button type="button" class="btn btn-xsm mb-5 mr-5" onclick="return otterwiki.toggle_pagename_prefix('new_pagename','{{prefix}}')">{{prefix}}/</button>
     {% endfor %}
     </div>
   </div>