diff --git a/src/add-ons/accelerants/nvidia/engine/nv_acc.c b/src/add-ons/accelerants/nvidia/engine/nv_acc.c
index e780a15647..6c945497af 100644
--- a/src/add-ons/accelerants/nvidia/engine/nv_acc.c
+++ b/src/add-ons/accelerants/nvidia/engine/nv_acc.c
@@ -379,6 +379,11 @@ status_t nv_acc_init()
 			ACCW(NV40P_WHAT1, 0x000000a0);
 			ACCW(NV45_WHAT2, 0x00000000);
 			ACCW(NV45_WHAT3, 0x00000000);
+			/* unknown.. */
+			NV_REG32(NV32_NV45_WHAT10) = NV_REG32(NV32_NV10STRAPINFO);
+			NV_REG32(NV32_NV45_WHAT11) = 0x00000000;
+			NV_REG32(NV32_NV45_WHAT12) = 0x00000000;
+			NV_REG32(NV32_NV45_WHAT13) = NV_REG32(NV32_NV10STRAPINFO);
 			break;
 		default:
 			ACCW(NV40P_WHAT0, 0x83280eff);