diff --git a/pipes.Rmd b/pipes.Rmd
index 6eb3367..a814849 100644
--- a/pipes.Rmd
+++ b/pipes.Rmd
@@ -101,7 +101,7 @@ This is less typing (and less thinking), so you're less likely to make mistakes.
     complete pipeline from the beginning.
     
 1.  The repetition of the object being transformed (we've written `foo_foo` six 
-    times!) obscures what's chaning on each line. 
+    times!) obscures what's changing on each line. 
 
 ### Function composition