1 files changed, 1 insertions, 1 deletions

diff --git a/ekdosis.dtx b/ekdosis.dtx
index 9bda050..7001eac 100644
--- a/ekdosis.dtx
+++ b/ekdosis.dtx
@@ -770,7 +770,7 @@ local function lem_rdg_totei(str)
               function(bkslash, cmd, opt, arg)
                  opt = string.sub(opt, 2, -2)
                  arg = string.sub(arg, 2, -2)
-                 opt = string.match(opt, "%f[%w]wit%s?%=%s?%b{}")
+                 opt = string.match(opt, "%f[%w]wit%s?%=%s?%b{}") or ""
                  opt = string.gsub(opt, "wit%s?%=%s?(%b{})", function(bbraces)
                                       bbraces = string.sub(bbraces, 2, -2)
                                       bbraces = ekdosis.getsiglum(bbraces, "tei")