diff --git a/src/apps/snmp/snmp_netconn.c b/src/apps/snmp/snmp_netconn.c
index 24c3e265..ba1f7e99 100644
--- a/src/apps/snmp/snmp_netconn.c
+++ b/src/apps/snmp/snmp_netconn.c
@@ -64,6 +64,11 @@ snmp_netconn_thread(void *arg)
   
   snmp_traps_handle = conn;
 
+#if LWIP_SNMP_V3
+  /* Start the engine time timer */
+  tcpip_enginetime_timer(NULL);
+#endif
+
   do {
     err = netconn_recv(conn, &buf);
 
diff --git a/src/apps/snmp/snmpv3_priv.h b/src/apps/snmp/snmpv3_priv.h
index ef8672da..ddd35341 100644
--- a/src/apps/snmp/snmpv3_priv.h
+++ b/src/apps/snmp/snmpv3_priv.h
@@ -65,6 +65,7 @@ err_t snmpv3_auth(struct snmp_pbuf_stream* stream, u16_t length, const u8_t* key
 err_t snmpv3_crypt(struct snmp_pbuf_stream* stream, u16_t length, const u8_t* key,
     const u8_t* priv_param, const u32_t engine_boots, const u32_t engine_time, u8_t algo, u8_t mode);
 err_t snmpv3_build_priv_param(u8_t* priv_param);
+void tcpip_enginetime_timer(void *arg);
 
 #endif