diff --git a/source/6LoWPAN/ws/ws_common.c b/source/6LoWPAN/ws/ws_common.c
index bfefb4b04c8..74a8dd18eed 100644
--- a/source/6LoWPAN/ws/ws_common.c
+++ b/source/6LoWPAN/ws/ws_common.c
@@ -390,12 +390,10 @@ void ws_common_neighbor_update(protocol_interface_info_entry_t *cur, const uint8
     }
 }
 
-void ws_common_aro_failure(protocol_interface_info_entry_t *cur, const uint8_t *ll_address, bool cache_full)
+void ws_common_aro_failure(protocol_interface_info_entry_t *cur, const uint8_t *ll_address)
 {
     tr_warn("ARO registration Failure %s", trace_ipv6(ll_address));
-    if (cache_full) {
-        blacklist_update(ll_address, false);
-    }
+    blacklist_update(ll_address, false);
     ws_bootstrap_aro_failure(cur, ll_address);
 }
 
diff --git a/source/6LoWPAN/ws/ws_common.h b/source/6LoWPAN/ws/ws_common.h
index c5198cb4e13..aa977417ddd 100644
--- a/source/6LoWPAN/ws/ws_common.h
+++ b/source/6LoWPAN/ws/ws_common.h
@@ -137,7 +137,7 @@ void ws_common_fast_timer(protocol_interface_info_entry_t *cur, uint16_t ticks);
 
 void ws_common_neighbor_update(protocol_interface_info_entry_t *cur, const uint8_t *ll_address);
 
-void ws_common_aro_failure(protocol_interface_info_entry_t *cur, const uint8_t *ll_address, bool cache_full);
+void ws_common_aro_failure(protocol_interface_info_entry_t *cur, const uint8_t *ll_address);
 
 void ws_common_neighbor_remove(protocol_interface_info_entry_t *cur, const uint8_t *ll_address);
 
@@ -155,7 +155,7 @@ uint32_t ws_common_version_timeout_get(uint8_t config);
 #define ws_info(cur) ((ws_info_t *) NULL)
 #define ws_common_seconds_timer(cur, seconds)
 #define ws_common_neighbor_update(cur, ll_address) ((void) 0)
-#define ws_common_aro_failure(cur, ll_address, cache_full)
+#define ws_common_aro_failure(cur, ll_address)
 #define ws_common_neighbor_remove(cur, ll_address)
 #define ws_common_fast_timer(cur, ticks) ((void) 0)
 #define ws_common_allow_child_registration(cur, eui64) (false)
diff --git a/source/Common_Protocols/icmpv6.c b/source/Common_Protocols/icmpv6.c
index 1a0f2c3355d..32bcd71e103 100644
--- a/source/Common_Protocols/icmpv6.c
+++ b/source/Common_Protocols/icmpv6.c
@@ -356,7 +356,7 @@ static void icmpv6_na_wisun_aro_handler(protocol_interface_info_entry_t *cur_int
 
     (void)life_time;
     if (nd_status != ARO_SUCCESS) {
-        ws_common_aro_failure(cur_interface, src_addr, true);
+        ws_common_aro_failure(cur_interface, src_addr);
     }
 }
 
@@ -1389,7 +1389,7 @@ static void icmpv6_aro_cb(buffer_t *buf, uint8_t status)
     }
     rpl_control_address_register_done(buf->interface, ll_address, status);
     if (status != SOCKET_TX_DONE) {
-        ws_common_aro_failure(buf->interface, ll_address, false);
+        ws_common_aro_failure(buf->interface, ll_address);
     }
 }
 
diff --git a/test/nanostack/unittest/stub/ws_common_stub.c b/test/nanostack/unittest/stub/ws_common_stub.c
index 691dbe40608..2e145f2bc98 100644
--- a/test/nanostack/unittest/stub/ws_common_stub.c
+++ b/test/nanostack/unittest/stub/ws_common_stub.c
@@ -67,11 +67,10 @@ bool ws_common_allow_child_registration(protocol_interface_info_entry_t *interfa
     (void) interface;
     return true;
 }
-void ws_common_aro_failure(protocol_interface_info_entry_t *cur, const uint8_t *ll_address, bool cache_full)
+void ws_common_aro_failure(protocol_interface_info_entry_t *cur, const uint8_t *ll_address)
 {
     (void) cur;
     (void) ll_address;
-    (void) cache_full;
 }
 void ws_common_neighbor_remove(protocol_interface_info_entry_t *cur, const uint8_t *ll_address)
 {