diff --git a/README.md b/README.md
index 2519149..d2d9905 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ In particular,
 * Chrono is space-optimal and (while not being the primary goal) reasonably efficient.
 
 There were several previous attempts to bring a good date and time library to Rust,
-which Chrono builts upon and should acknowledge:
+which Chrono builds upon and should acknowledge:
 
 * [Initial research on
    the wiki](https://github.com/rust-lang/rust-wiki-backup/blob/master/Lib-datetime.md)