diff --git a/make/tex.mk b/make/tex.mk
index fe46feb0..f75cfd7c 100644
--- a/make/tex.mk
+++ b/make/tex.mk
@@ -87,7 +87,7 @@ define mangle_tmpl
 		s/ö/\"o/g; \
 		s/Ö/\"O/g; \
 		s/ü/\"u/g; \
-		s/Ü/\"Ü/g; \
+		s/Ü/\"U/g; \
 		s/ß/\"s/g; \
 	" | sed -e "\
 		s/__DATE__/$(DATE)/g; \