diff --git a/lectures/09-io/lecture.slide b/lectures/09-io/lecture.slide
index c193975..52746f5 100644
--- a/lectures/09-io/lecture.slide
+++ b/lectures/09-io/lecture.slide
@@ -260,7 +260,7 @@ Readers are all over the standard library:
 - archive/...
 - compress/...
 - text/...
-- nex/http/ResponseWriter
+- net/http/ResponseWriter
 - // and many more
 
 * io.Pipe