diff --git a/src/components/views/rooms/EventTile.tsx b/src/components/views/rooms/EventTile.tsx
index 81791bdcce..0089773dc8 100644
--- a/src/components/views/rooms/EventTile.tsx
+++ b/src/components/views/rooms/EventTile.tsx
@@ -1519,7 +1519,7 @@ class E2ePadlock extends React.Component<IE2ePadlockProps> {
         // https://github.com/element-hq/compound/issues/294
         return (
             <Tooltip label={this.props.title} isTriggerInteractive={true}>
-                <div className={classes} tabIndex={0} />
+                <div className={classes} tabIndex={0} aria-label={_t("timeline|e2e_state")} />
             </Tooltip>
         );
     }
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index 8b43b71ac1..74265c1939 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -3272,6 +3272,7 @@
         "download_action_downloading": "Downloading",
         "download_failed": "Download failed",
         "download_failed_description": "An error occurred while downloading this file",
+        "e2e_state": "State of the end-to-end encryption",
         "edits": {
             "tooltip_label": "Edited at %(date)s. Click to view edits.",
             "tooltip_sub": "Click to view edits",