diff --git a/app/assets/javascripts/app/lib/bootstrap/modal.js b/app/assets/javascripts/app/lib/bootstrap/modal.js
index 6a6468667..241744883 100644
--- a/app/assets/javascripts/app/lib/bootstrap/modal.js
+++ b/app/assets/javascripts/app/lib/bootstrap/modal.js
@@ -239,6 +239,10 @@
       .css('width', this.$body.width())
       .css('height', 0)
       .css('height', this.$element[0].scrollHeight)
+
+    if(this.scrollbarWidth){
+      this.$backdrop.css('width', this.$body.width() - this.scrollbarWidth)
+    }
   }
 
   Modal.prototype.adjustDialog = function () {