diff --git a/cmd/ddns/ddns.go b/cmd/ddns/ddns.go
index 4b9aa892..b3eaaca7 100644
--- a/cmd/ddns/ddns.go
+++ b/cmd/ddns/ddns.go
@@ -1,3 +1,4 @@
+// Package main is the entry point of the Cloudflare DDNS updater.
 package main
 
 import (
diff --git a/test/fuzzer/fuzzer.go b/test/fuzzer/fuzzer.go
index e1d1878d..527a2192 100644
--- a/test/fuzzer/fuzzer.go
+++ b/test/fuzzer/fuzzer.go
@@ -1,3 +1,4 @@
+// Package fuzzer implements the fuzzing interface for ClusterFuzzLite.
 package fuzzer
 
 import (