diff --git a/builds/4chan-X.user.js b/builds/4chan-X.user.js
index 90345fb7d..675a73f8b 100644
--- a/builds/4chan-X.user.js
+++ b/builds/4chan-X.user.js
@@ -3736,7 +3736,7 @@
       sticky = isSticky ? " <img src=" + staticPath + "sticky" + gifIcon + " title=Sticky class=stickyIcon>" : '';
       closed = isClosed ? " <img src=" + staticPath + "closed" + gifIcon + " title=Closed class=closedIcon>" : '';
       if (isOP && g.VIEW === 'index') {
-        pageNum = Math.floor(Index.liveThreadData.keys.indexOf(postID) / Index.threadsNumPerPage);
+        pageNum = Math.floor(Index.liveThreadData.keys.indexOf("" + postID) / Index.threadsNumPerPage);
         pageIcon = " <span class=page-num title='This thread is on page " + pageNum + " in the original index.'>Page " + pageNum + "</span>";
         replyLink = " &nbsp; <span>[<a href='/" + boardID + "/res/" + threadID + "' class=replylink>Reply</a>]</span>";
       } else {
@@ -3805,7 +3805,7 @@
       data = Index.liveThreadData[thread.ID];
       postCount = data.replies + 1;
       fileCount = data.images + !!data.ext;
-      pageCount = Math.floor(Index.liveThreadData.keys.indexOf(thread.ID) / Index.threadsNumPerPage);
+      pageCount = Math.floor(Index.liveThreadData.keys.indexOf("" + thread.ID) / Index.threadsNumPerPage);
       subject = thread.OP.info.subject ? "<div class='subject'>" + thread.OP.info.subject + "</div>" : '';
       comment = thread.OP.nodes.comment.innerHTML.replace(/(<br>\s*){2,}/g, '<br>');
       root = $.el('div', {
diff --git a/builds/crx/script.js b/builds/crx/script.js
index edafd5d36..336cee79b 100644
--- a/builds/crx/script.js
+++ b/builds/crx/script.js
@@ -3795,7 +3795,7 @@
       sticky = isSticky ? " <img src=" + staticPath + "sticky" + gifIcon + " title=Sticky class=stickyIcon>" : '';
       closed = isClosed ? " <img src=" + staticPath + "closed" + gifIcon + " title=Closed class=closedIcon>" : '';
       if (isOP && g.VIEW === 'index') {
-        pageNum = Math.floor(Index.liveThreadData.keys.indexOf(postID) / Index.threadsNumPerPage);
+        pageNum = Math.floor(Index.liveThreadData.keys.indexOf("" + postID) / Index.threadsNumPerPage);
         pageIcon = " <span class=page-num title='This thread is on page " + pageNum + " in the original index.'>Page " + pageNum + "</span>";
         replyLink = " &nbsp; <span>[<a href='/" + boardID + "/res/" + threadID + "' class=replylink>Reply</a>]</span>";
       } else {
@@ -3864,7 +3864,7 @@
       data = Index.liveThreadData[thread.ID];
       postCount = data.replies + 1;
       fileCount = data.images + !!data.ext;
-      pageCount = Math.floor(Index.liveThreadData.keys.indexOf(thread.ID) / Index.threadsNumPerPage);
+      pageCount = Math.floor(Index.liveThreadData.keys.indexOf("" + thread.ID) / Index.threadsNumPerPage);
       subject = thread.OP.info.subject ? "<div class='subject'>" + thread.OP.info.subject + "</div>" : '';
       comment = thread.OP.nodes.comment.innerHTML.replace(/(<br>\s*){2,}/g, '<br>');
       root = $.el('div', {
diff --git a/src/General/Build.coffee b/src/General/Build.coffee
index 4896ea58a..be0a55576 100755
--- a/src/General/Build.coffee
+++ b/src/General/Build.coffee
@@ -181,7 +181,7 @@ Build =
       ''
 
     if isOP and g.VIEW is 'index'
-      pageNum   = Index.liveThreadData.keys.indexOf(postID) // Index.threadsNumPerPage
+      pageNum   = Index.liveThreadData.keys.indexOf("#{postID}") // Index.threadsNumPerPage
       pageIcon  = " <span class=page-num title='This thread is on page #{pageNum} in the original index.'>Page #{pageNum}</span>"
       replyLink = " &nbsp; <span>[<a href='/#{boardID}/res/#{threadID}' class=replylink>Reply</a>]</span>"
     else
@@ -241,7 +241,7 @@ Build =
 
     postCount = data.replies + 1
     fileCount = data.images  + !!data.ext
-    pageCount = Index.liveThreadData.keys.indexOf(thread.ID) // Index.threadsNumPerPage
+    pageCount = Index.liveThreadData.keys.indexOf("#{thread.ID}") // Index.threadsNumPerPage
 
     subject = if thread.OP.info.subject
       "<div class='subject'>#{thread.OP.info.subject}</div>"