diff --git a/ahilbig-presentation.sty b/ahilbig-presentation.sty
index fa866da..13e2aa4 100644
--- a/ahilbig-presentation.sty
+++ b/ahilbig-presentation.sty
@@ -1326,8 +1326,8 @@
   {\egroup\egroup}
 }
 
-\newenvironment{lecture notes intro}
-{\begin{lecture notes only}[\translate{Worum es heute geht}]\normalsize\ignorespaces}{\end{lecture notes only}}
+\newenvironment{lecture notes intro}[1][\translate{Worum es heute geht}]
+{\begin{lecture notes only}[#1]\normalsize\ignorespaces}{\end{lecture notes only}}
 
 \newenvironment{lecture notes reference}[1][]
 {
diff --git a/ahilbig-script.sty b/ahilbig-script.sty
index 12f0cf8..9cb0a06 100644
--- a/ahilbig-script.sty
+++ b/ahilbig-script.sty
@@ -1396,8 +1396,8 @@
   {\egroup\egroup}
 }
 
-\newenvironment{lecture notes intro}
-{\begin{lecture notes only}[\translate{Worum es heute geht}]\normalsize\ignorespaces}{\end{lecture notes only}}
+\newenvironment{lecture notes intro}[1][\translate{Worum es heute geht}]
+{\begin{lecture notes only}[#1]\normalsize\ignorespaces}{\end{lecture notes only}}
 
 \newenvironment{lecture notes reference}[1][]
 {