diff --git a/pimd/pim_assert.c b/pimd/pim_assert.c
index ca21786aea..29a241b277 100644
--- a/pimd/pim_assert.c
+++ b/pimd/pim_assert.c
@@ -241,6 +241,7 @@ int pim_assert_recv(struct interface *ifp,
   /*
     Parse assert group addr
    */
+  memset (&sg, 0, sizeof (struct prefix_sg));
   offset = pim_parse_addr_group (&sg, curr, curr_size);
   if (offset < 1) {
     char src_str[INET_ADDRSTRLEN];
diff --git a/pimd/pim_join.c b/pimd/pim_join.c
index 8ef2cada87..53c91ab4af 100644
--- a/pimd/pim_join.c
+++ b/pimd/pim_join.c
@@ -293,6 +293,7 @@ int pim_joinprune_recv(struct interface *ifp,
     uint16_t      msg_num_pruned_sources;
     int           source;
 
+    memset (&sg, 0, sizeof (struct prefix_sg));
     addr_offset = pim_parse_addr_group (&sg,
 					buf, pastend - buf);
     if (addr_offset < 1) {
diff --git a/pimd/pim_register.c b/pimd/pim_register.c
index 229232fde4..e012115e37 100644
--- a/pimd/pim_register.c
+++ b/pimd/pim_register.c
@@ -105,11 +105,11 @@ pim_register_stop_recv (uint8_t *buf, int buf_size)
   struct prefix_sg sg;
   int l;
 
+  memset (&sg, 0, sizeof (struct prefix_sg));
   l = pim_parse_addr_group (&sg, buf, buf_size);
   buf += l;
   buf_size -= l;
   pim_parse_addr_ucast (&source, buf, buf_size);
-  memset (&sg, 0, sizeof (struct prefix_sg));
   sg.src = source.u.prefix4;
 
   if (PIM_DEBUG_PIM_REG)