diff --git a/tinygrad/runtime/support/nv/ip.py b/tinygrad/runtime/support/nv/ip.py
index 29bda7a0df..6b1253593d 100644
--- a/tinygrad/runtime/support/nv/ip.py
+++ b/tinygrad/runtime/support/nv/ip.py
@@ -158,6 +158,7 @@ class NV_FLCN(NV_IP):
       imemPa=self.desc_v3.IMEMPhysBase, imemVa=self.desc_v3.IMEMVirtBase, imemSz=self.desc_v3.IMEMLoadSize,
       dmemPa=self.desc_v3.DMEMPhysBase, dmemVa=0x0, dmemSz=self.desc_v3.DMEMLoadSize,
       pkc_off=self.desc_v3.PKCDataOffset, engid=self.desc_v3.EngineIdMask, ucodeid=self.desc_v3.UcodeId)
+    assert self.nvdev.NV_PFB_PRI_MMU_WPR2_ADDR_HI.read() != 0, "WPR2 is not initialized"
 
     self.reset(self.falcon, riscv=True)