diff --git a/visualize.Rmd b/visualize.Rmd
index d862396..42a63a2 100644
--- a/visualize.Rmd
+++ b/visualize.Rmd
@@ -509,7 +509,7 @@ This works because every geom has a default stat; and every stat has a default g
       geom_bar(mapping = aes(x = a, y = b), stat = "identity")
     ```
     
-    (Don't worry that you haven't seen `<-` or `tibble()` before. You might be
+    (Don't worry that you haven't seen `<-` or `tribble()` before. You might be
     able to guess at their meaning from the context, and you'll learn exactly
     what they do soon!)