diff --git a/gitlab/functions.sh b/gitlab/functions.sh
index 699aa0eb22437f9a90be95d7d4e14b41aa33808a..180a119695cb25f6b7dc01764c55415b1d36af49 100644
--- a/gitlab/functions.sh
+++ b/gitlab/functions.sh
@@ -474,4 +474,6 @@ fi
 export_env DOC_SERVER_PREFIX
 check_env DOC_UPLOADS
 
-check_env LANG
+# Sets up the language so Unicode filenames are considered correctly
+LANG="C"
+export_env LANG