diff --git a/src/ioslaves/file/fdreceiver.cpp b/src/ioslaves/file/fdreceiver.cpp
--- a/src/ioslaves/file/fdreceiver.cpp
+++ b/src/ioslaves/file/fdreceiver.cpp
@@ -71,7 +71,7 @@
 {
     int client = ::accept(m_socketDes, NULL, NULL);
     if (client > 0) {
-        // Receive fd only if socket owner is root
+        // Receive fd only if socket owner is root (our setuid helper)
         bool acceptConnection = false;
 #if defined(__linux__)
         ucred cred;