diff --git a/nimble/drivers/nrf51/src/ble_hw.c b/nimble/drivers/nrf51/src/ble_hw.c
index c371af813..0bf834cd1 100644
--- a/nimble/drivers/nrf51/src/ble_hw.c
+++ b/nimble/drivers/nrf51/src/ble_hw.c
@@ -448,7 +448,7 @@ ble_hw_resolv_list_rmv(int index)
         --g_nrf_num_irks;
         irk_entry = &g_nrf_irk_list[index];
         if (g_nrf_num_irks > index) {
-            memmove(irk_entry, irk_entry + 4, g_nrf_num_irks - index);
+            memmove(irk_entry, irk_entry + 4, 16 * (g_nrf_num_irks - index));
         }
     }
 }
diff --git a/nimble/drivers/nrf52/src/ble_hw.c b/nimble/drivers/nrf52/src/ble_hw.c
index f084ff15e..68104e444 100644
--- a/nimble/drivers/nrf52/src/ble_hw.c
+++ b/nimble/drivers/nrf52/src/ble_hw.c
@@ -448,7 +448,7 @@ ble_hw_resolv_list_rmv(int index)
         --g_nrf_num_irks;
         irk_entry = &g_nrf_irk_list[index];
         if (g_nrf_num_irks > index) {
-            memmove(irk_entry, irk_entry + 4, g_nrf_num_irks - index);
+            memmove(irk_entry, irk_entry + 4, 16 * (g_nrf_num_irks - index));
         }
     }
 }