diff --git a/service/OneService.cpp b/service/OneService.cpp
index a1c53764..757863a8 100644
--- a/service/OneService.cpp
+++ b/service/OneService.cpp
@@ -2244,6 +2244,12 @@ public:
 #endif
 					syncManagedStuff(n,true,true);
 					n.tap->setMtu(nwc->mtu);
+#if defined(ZT_SDK)
+					// Inform the virtual tap of the update
+					if (op == ZT_VIRTUAL_NETWORK_CONFIG_OPERATION_CONFIG_UPDATE) {
+						n.tap->lastConfigUpdate(OSUtils::now());
+					}
+#endif
 				} else {
 					_nets.erase(nwid);
 					return -999; // tap init failed