diff --git a/themes/original/css/common.css.php b/themes/original/css/common.css.php
index baad09fd48..4363fb728b 100644
--- a/themes/original/css/common.css.php
+++ b/themes/original/css/common.css.php
@@ -388,6 +388,7 @@ img.lightbulb {
 
 /* leave some space between icons and text */
 .icon {
+    image-rendering: pixelated;
     vertical-align:     middle;
     margin-<?php echo $left; ?>:        0.3em;
 }
diff --git a/themes/pmahomme/css/common.css.php b/themes/pmahomme/css/common.css.php
index c2ad82cc02..8dddfc76f4 100644
--- a/themes/pmahomme/css/common.css.php
+++ b/themes/pmahomme/css/common.css.php
@@ -684,6 +684,7 @@ img.lightbulb {
 
 /* no extra space in table cells */
 td .icon {
+    image-rendering: pixelated;
     margin: 0;
 }