diff --git a/res/css/views/rooms/_MemberDeviceInfo.scss b/res/css/views/rooms/_MemberDeviceInfo.scss
index 9fabd9153e..523635bb1a 100644
--- a/res/css/views/rooms/_MemberDeviceInfo.scss
+++ b/res/css/views/rooms/_MemberDeviceInfo.scss
@@ -42,6 +42,7 @@ limitations under the License.
 
 .mx_MemberDeviceInfo_deviceInfo {
     margin: 0 5px 5px 8px;
+    flex: 1;
 }
 
 /* "Unblacklist" is too long for a regular button: make it wider and