diff --git a/WiMa-B-01a/WS17 WiMa-B-01a.tex b/WiMa-B-01a/WS17 WiMa-B-01a.tex
index a8f304f..88c99ec 100644
--- a/WiMa-B-01a/WS17 WiMa-B-01a.tex	
+++ b/WiMa-B-01a/WS17 WiMa-B-01a.tex	
@@ -17,7 +17,7 @@
 			an.
 				\begin{enumerate}
 					\item $L={x|x<3} $
-					\item $L={} $
+					\item $L=\{\} $
 					\item $L={1;5} $
 					\item $L={x|x>3} $
 					\item $L={x|x<1} $