diff --git a/src/Posting/Captcha.v2.coffee b/src/Posting/Captcha.v2.coffee
index aea247525..662ca209c 100644
--- a/src/Posting/Captcha.v2.coffee
+++ b/src/Posting/Captcha.v2.coffee
@@ -138,6 +138,9 @@ Captcha.v2 =
     $.global ->
       f = document.querySelector('#qr iframe')
       f.focus = f.blur = ->
+    # XXX Make sure scroll on space prevention (see src/css/style.css) doesn't cause scrolling of div
+    if $.engine is 'blink' and iframe.parentNode in $$('#qr .captcha-container > div > div:first-of-type')
+      $.on iframe.parentNode, 'scroll', -> @scrollTop = 0
 
   fixQRPosition: ->
     if QR.nodes.el.getBoundingClientRect().bottom > doc.clientHeight
diff --git a/src/css/style.css b/src/css/style.css
index e217bd534..4799ce273 100644
--- a/src/css/style.css
+++ b/src/css/style.css
@@ -1394,7 +1394,7 @@ input.field.tripped:not(:hover):not(:focus) {
   margin: auto;
   width: 304px;
 }
-/* scrollable with scroll bar hidden; prevents scroll on space press */
+/* XXX scrollable with scroll bar hidden; prevents scroll on space press */
 :root.ua-blink #qr .captcha-container > div {
   overflow: hidden;
 }
@@ -1402,6 +1402,8 @@ input.field.tripped:not(:hover):not(:focus) {
   overflow-y: scroll;
   overflow-x: hidden;
   padding-right: 15px;
+  height: 99%;
+  width: 100%;
 }
 #qr .captcha-counter {
   display: block;