diff --git a/lib/drivers/ip/network/neighbor.c b/lib/drivers/ip/network/neighbor.c
index 330caa48117..6f924110d8f 100644
--- a/lib/drivers/ip/network/neighbor.c
+++ b/lib/drivers/ip/network/neighbor.c
@@ -157,7 +157,9 @@ VOID NBTimeout(VOID)
                 NCE->EventTimer--;
                 if (NCE->EventTimer == 0) {
                     /* Call timeout handler for NCE */
+                    TcpipReleaseSpinLock(&NeighborCache[i].Lock, OldIrql);
                     NCETimeout(NCE);
+                    TcpipAcquireSpinLock(&NeighborCache[i].Lock, &OldIrql);
                 }
             }
         }