diff --git a/automotive/can/1.0/default/libnetdevice/can.cpp b/automotive/can/1.0/default/libnetdevice/can.cpp
index 8d82c36..9cf0253 100644
--- a/automotive/can/1.0/default/libnetdevice/can.cpp
+++ b/automotive/can/1.0/default/libnetdevice/can.cpp
@@ -70,7 +70,7 @@
     can_bittiming bt = {};
     bt.bitrate = bitrate;
 
-    nl::MessageFactory<ifinfomsg> req(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_ACK);
+    nl::MessageFactory<ifinfomsg> req(RTM_NEWLINK);
 
     req->ifi_index = nametoindex(ifname);
     if (req->ifi_index == 0) {
diff --git a/automotive/can/1.0/default/libnetdevice/libnetdevice.cpp b/automotive/can/1.0/default/libnetdevice/libnetdevice.cpp
index 4c4b77b..1830633 100644
--- a/automotive/can/1.0/default/libnetdevice/libnetdevice.cpp
+++ b/automotive/can/1.0/default/libnetdevice/libnetdevice.cpp
@@ -104,8 +104,7 @@
 }
 
 bool addAddr4(std::string_view ifname, std::string_view addr, uint8_t prefixlen) {
-    android::nl::MessageFactory<ifaddrmsg> req(
-            RTM_NEWADDR, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK);
+    nl::MessageFactory<ifaddrmsg> req(RTM_NEWADDR, nl::kCreateFlags);
     req->ifa_family = AF_INET;
     req->ifa_prefixlen = prefixlen;
     req->ifa_flags = IFA_F_SECONDARY;
@@ -120,8 +119,7 @@
 }
 
 bool add(std::string_view dev, std::string_view type) {
-    nl::MessageFactory<ifinfomsg> req(RTM_NEWLINK,
-                                      NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK);
+    nl::MessageFactory<ifinfomsg> req(RTM_NEWLINK, nl::kCreateFlags);
     req.add(IFLA_IFNAME, dev);
 
     {
@@ -134,7 +132,7 @@
 }
 
 bool del(std::string_view dev) {
-    nl::MessageFactory<ifinfomsg> req(RTM_DELLINK, NLM_F_REQUEST | NLM_F_ACK);
+    nl::MessageFactory<ifinfomsg> req(RTM_DELLINK);
     req.add(IFLA_IFNAME, dev);
 
     nl::Socket sock(NETLINK_ROUTE);
diff --git a/automotive/can/1.0/default/libnetdevice/vlan.cpp b/automotive/can/1.0/default/libnetdevice/vlan.cpp
index a437c32..e5b5a61 100644
--- a/automotive/can/1.0/default/libnetdevice/vlan.cpp
+++ b/automotive/can/1.0/default/libnetdevice/vlan.cpp
@@ -33,8 +33,7 @@
         return false;
     }
 
-    nl::MessageFactory<ifinfomsg> req(RTM_NEWLINK,
-                                      NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK);
+    nl::MessageFactory<ifinfomsg> req(RTM_NEWLINK, nl::kCreateFlags);
     req.add(IFLA_IFNAME, vlan);
     req.add<uint32_t>(IFLA_LINK, ethidx);
 
diff --git a/automotive/can/1.0/default/libnl++/include/libnl++/MessageFactory.h b/automotive/can/1.0/default/libnl++/include/libnl++/MessageFactory.h
index a5a425e..f65f055 100644
--- a/automotive/can/1.0/default/libnl++/include/libnl++/MessageFactory.h
+++ b/automotive/can/1.0/default/libnl++/include/libnl++/MessageFactory.h
@@ -26,6 +26,9 @@
 
 namespace android::nl {
 
+static constexpr uint16_t kDefaultFlags = NLM_F_REQUEST | NLM_F_ACK;
+static constexpr uint16_t kCreateFlags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK;
+
 class MessageFactoryBase {
   protected:
     static nlattr* add(nlmsghdr* msg, size_t maxLen, nlattrtype_t type, const void* data,
@@ -54,7 +57,7 @@
      * \param type Message type (such as RTM_NEWLINK).
      * \param flags Message flags (such as NLM_F_REQUEST).
      */
-    MessageFactory(nlmsgtype_t type, uint16_t flags)
+    MessageFactory(nlmsgtype_t type, uint16_t flags = kDefaultFlags)
         : header(mMessage.header), data(mMessage.data) {
         mMessage.header.nlmsg_len = offsetof(Message, attributesBuffer);
         mMessage.header.nlmsg_type = type;