diff --git a/app/internal_packages/open-tracking/lib/open-tracking-composer-extension.es6 b/app/internal_packages/open-tracking/lib/open-tracking-composer-extension.es6
index 8c7c13b17..13018610e 100644
--- a/app/internal_packages/open-tracking/lib/open-tracking-composer-extension.es6
+++ b/app/internal_packages/open-tracking/lib/open-tracking-composer-extension.es6
@@ -20,7 +20,7 @@ export default class OpenTrackingComposerExtension extends ComposerExtension {
     const imgFragment = document
       .createRange()
       .createContextualFragment(
-        `<img class="mailspring-open" width="0" height="0" style="border:0; width:0; height:0;" src="${serverUrl}">`
+        `<img class="mailspring-open" alt="Open Tracking" width="0" height="0" style="border:0; width:0; height:0;" src="${serverUrl}">`
       );
     const beforeEl = draftBodyRootNode.querySelector('.gmail_quote');
     if (beforeEl) {