diff --git a/baseframe/static/css/mui.css b/baseframe/static/css/mui.css
index 8c48277d..f93cc3a5 100644
--- a/baseframe/static/css/mui.css
+++ b/baseframe/static/css/mui.css
@@ -3809,7 +3809,7 @@ h1, h2, h3 {
 
 .thumbnail {
   position: relative;
-  ddisplay: -ms-flexbox;
+  display: -ms-flexbox;
   display: -webkit-flex;
   display: flex;
   margin-bottom: 5px;
diff --git a/baseframe/static/sass/baseframe-material/_thumbnail.scss b/baseframe/static/sass/baseframe-material/_thumbnail.scss
index 0591fa21..b3dd6f84 100644
--- a/baseframe/static/sass/baseframe-material/_thumbnail.scss
+++ b/baseframe/static/sass/baseframe-material/_thumbnail.scss
@@ -1,6 +1,6 @@
 .thumbnail {
 	position: relative;
-    ddisplay: -ms-flexbox;
+    display: -ms-flexbox;
     display: -webkit-flex;
     display: flex;
     margin-bottom: 5px;