diff --git a/sys/net/gnrc/network_layer/ipv6/nib/nib_ft.c b/sys/net/gnrc/network_layer/ipv6/nib/nib_ft.c
index 4b4a965bd7..2268034327 100644
--- a/sys/net/gnrc/network_layer/ipv6/nib/nib_ft.c
+++ b/sys/net/gnrc/network_layer/ipv6/nib/nib_ft.c
@@ -100,8 +100,9 @@ bool gnrc_ipv6_nib_ft_iter(const ipv6_addr_t *next_hop, unsigned iface,
         _nib_offl_entry_t *offl = *state;
 
         while ((offl = _nib_offl_iter(offl))) {
-            assert((offl->mode != 0) || (offl->next_hop != NULL));
-            if (((iface == 0) || (iface == _nib_onl_get_if(offl->next_hop))) &&
+            assert(offl->mode != 0);
+            if ((offl->next_hop != NULL) &&
+                ((iface == 0) || (iface == _nib_onl_get_if(offl->next_hop))) &&
                 ((next_hop == NULL) || ipv6_addr_equal(&offl->next_hop->ipv6,
                                                        next_hop))) {
                 _nib_ft_get(offl, fte);
@@ -113,8 +114,8 @@ bool gnrc_ipv6_nib_ft_iter(const ipv6_addr_t *next_hop, unsigned iface,
     }
     entry = *state;
     while ((entry = _nib_drl_iter(entry))) {
-        assert((entry->next_hop != NULL));
-        if (((iface == 0) || (iface == _nib_onl_get_if(entry->next_hop))) &&
+        if ((entry->next_hop != NULL) &&
+            ((iface == 0) || (iface == _nib_onl_get_if(entry->next_hop))) &&
             ((next_hop == NULL) || ipv6_addr_equal(&entry->next_hop->ipv6,
                                                    next_hop))) {
             _nib_drl_ft_get(entry, fte);
diff --git a/sys/net/gnrc/network_layer/ipv6/nib/nib_pl.c b/sys/net/gnrc/network_layer/ipv6/nib/nib_pl.c
index 635d9dec0d..125582a2a7 100644
--- a/sys/net/gnrc/network_layer/ipv6/nib/nib_pl.c
+++ b/sys/net/gnrc/network_layer/ipv6/nib/nib_pl.c
@@ -81,8 +81,7 @@ bool gnrc_ipv6_nib_pl_iter(unsigned iface, void **state,
     mutex_lock(&_nib_mutex);
     while ((dst = _nib_offl_iter(dst)) != NULL) {
         const _nib_onl_entry_t *node = dst->next_hop;
-        assert(node != NULL);
-        if ((dst->mode & _PL) &&
+        if ((node != NULL) && (dst->mode & _PL) &&
             ((iface == 0) || (_nib_onl_get_if(node) == iface))) {
             entry->pfx_len = dst->pfx_len;
             ipv6_addr_set_unspecified(&entry->pfx);