diff --git a/site/building.md b/site/building.md
index dcfc21891..70ce93bcc 100644
--- a/site/building.md
+++ b/site/building.md
@@ -76,7 +76,7 @@ To collect a blocking profile of the Scope App, make sure you have launched
 Scope with `--app.block.profile.rate=N` (where `N` is the number of
 nanoseconds between samples) and then:
 
-    go tool pprof http://localhost:4040/debug/pprof/
+    go tool pprof http://localhost:4040/debug/pprof/block
 
 If you don't have `go` installed, you can use a Docker container instead: