diff --git a/examples/interfaces/interfaces.sh b/examples/interfaces/interfaces.sh
index d32ff4a..f800e3a 100644
--- a/examples/interfaces/interfaces.sh
+++ b/examples/interfaces/interfaces.sh
@@ -7,4 +7,4 @@ $ go run interfaces.go
 31.41592653589793
 
 # To learn more about Go's interfaces, check out this
-# [great blog post](...).
+# [great blog post](http://jordanorelli.tumblr.com/post/32665860244/how-to-use-interfaces-in-go).