diff --git a/4chan_x.user.js b/4chan_x.user.js
index 24e702b99..1f9e74450 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -452,6 +452,9 @@
     })();
     dragstart = function(e) {
       var el, isTouching, o, rect, screenHeight, screenWidth;
+      if (e.type === 'mousedown' && e.button !== 0) {
+        return;
+      }
       e.preventDefault();
       el = $.x('ancestor::div[contains(@class,"dialog")][1]', this);
       if (isTouching = e.type === 'touchstart') {
diff --git a/lib/ui.coffee b/lib/ui.coffee
index 517bc3965..65266bace 100644
--- a/lib/ui.coffee
+++ b/lib/ui.coffee
@@ -197,6 +197,8 @@ UI = do ->
 
 
   dragstart = (e) ->
+    if e.type is 'mousedown' and e.button isnt 0 # not LMB
+      return
     # prevent text selection
     e.preventDefault()
     el = $.x 'ancestor::div[contains(@class,"dialog")][1]', @