diff --git a/src/core/snmp/mib_structs.c b/src/core/snmp/mib_structs.c
index ec143491..e68636a1 100644
--- a/src/core/snmp/mib_structs.c
+++ b/src/core/snmp/mib_structs.c
@@ -1083,6 +1083,8 @@ snmp_expand_tree(struct mib_node *node, u8_t ident_len, s32_t *ident, struct snm
 
       /* find right child ptr */
       child.r_ptr = NULL;
+      child.r_id = 0;
+      child.r_nl = 0;
       while ((node_stack_cnt > 0) && (child.r_ptr == NULL))
       {
         pop_node(&child);
diff --git a/src/core/snmp/msg_in.c b/src/core/snmp/msg_in.c
index f00ea243..d0718501 100644
--- a/src/core/snmp/msg_in.c
+++ b/src/core/snmp/msg_in.c
@@ -825,7 +825,7 @@ snmp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *addr,
       err_t err_ret;
       u16_t payload_len;
       u16_t payload_ofs;
-      u16_t varbind_ofs;
+      u16_t varbind_ofs = 0;
 
       /* accepting request */
       snmp_inc_snmpinpkts();