diff --git a/addons/mail/static/src/components/attachment_viewer/attachment_viewer.xml b/addons/mail/static/src/components/attachment_viewer/attachment_viewer.xml
index 4126c213745..f462765d19d 100644
--- a/addons/mail/static/src/components/attachment_viewer/attachment_viewer.xml
+++ b/addons/mail/static/src/components/attachment_viewer/attachment_viewer.xml
@@ -66,7 +66,7 @@
                         <i class="fa fa-fw fa-search" role="img"/>
                     </div>
                     <div class="o_AttachmentViewer_toolbarButton" t-att-class="{ o_disabled: attachmentViewer.scale === MIN_SCALE }" t-on-click="_onClickZoomOut" title="Zoom Out (-)" role="button">
-                        <i class="fafa-fw fa-minus" role="img"/>
+                        <i class="fa fa-fw fa-minus" role="img"/>
                     </div>
                     <div class="o_AttachmentViewer_toolbarButton" t-on-click="_onClickRotate" title="Rotate (r)" role="button">
                         <i class="fa fa-fw fa-repeat" role="img"/>