diff --git a/pkg/activator/util/header.go b/pkg/activator/util/header.go
index 224747ceaa7a..d07f177b0fc6 100644
--- a/pkg/activator/util/header.go
+++ b/pkg/activator/util/header.go
@@ -30,7 +30,7 @@ var headersToRemove = []string{
 }
 
 // SetupHeaderPruning will cause the http.ReverseProxy
-// to no forward activator headers
+// to not forward activator headers
 func SetupHeaderPruning(p *httputil.ReverseProxy) {
 	// Director is never null - otherwise ServeHTTP panics
 	orig := p.Director