diff --git a/lms/static/images/wmd-buttons-transparent.png b/lms/static/images/wmd-buttons-transparent.png
new file mode 100644
index 0000000000..b2bf7def66
Binary files /dev/null and b/lms/static/images/wmd-buttons-transparent.png differ
diff --git a/lms/static/sass/_discussion.scss b/lms/static/sass/_discussion.scss
index d203e15637..f6333b6a5c 100644
--- a/lms/static/sass/_discussion.scss
+++ b/lms/static/sass/_discussion.scss
@@ -1537,6 +1537,14 @@ body.discussion {
 
   .comment-form {
     padding: 8px 20px;
+
+    .wmd-button {
+      background: transparent;
+
+      span {
+        background-image: url(../images/wmd-buttons-transparent.png);
+      }
+    }
   }
 
   .comment-form-input {