diff --git a/ext/qr_code/theme.php b/ext/qr_code/theme.php
index 90221b26..8c46b308 100644
--- a/ext/qr_code/theme.php
+++ b/ext/qr_code/theme.php
@@ -6,10 +6,8 @@ class QRImageTheme extends Themelet {
 	public function links_block($link) {
 		global $page;
 
-		$protocol = is_https_enabled() ? "https://" : "http://";
-
 		$page->add_block( new Block(
-			"QR Code","<img alt='QR Code' src='{$protocol}chart.apis.google.com/chart?chs=150x150&amp;cht=qr&amp;chl={$link}' />","left",50));
+			"QR Code","<img alt='QR Code' src='//chart.apis.google.com/chart?chs=150x150&amp;cht=qr&amp;chl={$link}' />","left",50));
 	}
 }