diff --git a/mod/assign/feedback/editpdf/styles.css b/mod/assign/feedback/editpdf/styles.css
index a1796168023..d723442ebd0 100644
--- a/mod/assign/feedback/editpdf/styles.css
+++ b/mod/assign/feedback/editpdf/styles.css
@@ -147,6 +147,8 @@
 
 .assignfeedback_editpdf_commentsearch ul li pre {
     background-color: #efefef;
+    white-space: pre-wrap;
+    word-break: break-word;
 }
 
 .assignfeedback_editpdf_commentsearch ul li pre:hover {