diff --git a/CHANGES.md b/CHANGES.md
index 12545a83..d8898e54 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -5,6 +5,7 @@ Changes
 -------
 
 ### Unreleased
+* 2018-03-01 - Re-added (empty) pre.scss due to problems with child themes.
 * 2018-03-01 - Further fixes to footer SCSS due to changes in Moodle core.
 
 ### Release v3.4-r3
diff --git a/scss/pre.scss b/scss/pre.scss
new file mode 100644
index 00000000..e69de29b