diff --git a/hack/lib/golang.sh b/hack/lib/golang.sh
index 05c07766718..cef8a6fee53 100755
--- a/hack/lib/golang.sh
+++ b/hack/lib/golang.sh
@@ -701,6 +701,8 @@ kube::golang::build_some_binaries() {
    fi
 }
 
+# Args:
+#  $1: platform (e.g. darwin/amd64)
 kube::golang::build_binaries_for_platform() {
   # This is for sanity.  Without it, user umasks can leak through.
   umask 0022