diff --git a/hw/npu.c b/hw/npu.c
index b113800b9afd..85750c924268 100644
--- a/hw/npu.c
+++ b/hw/npu.c
@@ -1153,6 +1153,9 @@ static void npu_probe_phb(struct dt_node *dn)
 	dt_add_property_cells(np, "ibm,links", links);
 	dt_add_property(np, "ibm,mmio-window", mm_win, sizeof(mm_win));
 	dt_add_property_cells(np, "ibm,phb-diag-data-size", 0);
+
+	/* Disable fast reboot - not currently supported */
+	disable_fast_reboot("NVLink device enabled");
 }
 
 static void npu_dev_populate_vendor_cap(struct npu_dev_cap *cap)