diff --git a/mod/forum/pix/t/subscribed.svg b/mod/forum/pix/t/subscribed.svg
index 374edf71a9b..49c1e449ec9 100644
--- a/mod/forum/pix/t/subscribed.svg
+++ b/mod/forum/pix/t/subscribed.svg
@@ -2,6 +2,6 @@
 <!-- Generator: Adobe Illustrator 18.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
-	 viewBox="0 0 12 12" style="enable-background:new 0 0 12 12;" xml:space="preserve">
+	 viewBox="0 0 12 12" style="enable-background:new 0 0 12 12;" xml:space="preserve" preserveAspectRatio="xMinYMid meet">
 <path style="fill:#808080;" d="M0,1v10h12V1H0z M11,2L6,5.7L1,2H11z M11,10H1V1.9L6,7l5-5.1V10z"/>
 </svg>
diff --git a/mod/forum/pix/t/unsubscribed.svg b/mod/forum/pix/t/unsubscribed.svg
index 3d1ea34029e..97f049c17c8 100644
--- a/mod/forum/pix/t/unsubscribed.svg
+++ b/mod/forum/pix/t/unsubscribed.svg
@@ -2,6 +2,6 @@
 <!-- Generator: Adobe Illustrator 18.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
-	 viewBox="0 0 12 12" style="enable-background:new 0 0 12 12;" xml:space="preserve">
+	 viewBox="0 0 12 12" style="enable-background:new 0 0 12 12;" xml:space="preserve" preserveAspectRatio="xMinYMid meet">
 <circle style="fill:#808080;" cx="6" cy="6" r="2.3"/>
 </svg>