diff --git a/dsv4/kernels/attention/fmha.py b/dsv4/kernels/attention/fmha.py
index 0cf1ca0f..79e3d645 100644
--- a/dsv4/kernels/attention/fmha.py
+++ b/dsv4/kernels/attention/fmha.py
@@ -250,7 +250,7 @@ class FmhaKernel:
                 for j in cutlass.range(cute.size(rP_bf16_reg), vectorize=True):
                     # TODO: proper element mapping from QK→PV partition
                     rP_bf16_reg[j] = BFloat16(0.0)
-                cute.copy(rP_bf16_reg, tCrP_smem)
+                cute.copy(tCrP_smem, rP_bf16_reg)
                 cute.arch.fence_proxy("async.shared", space="cta")
 
                 si_handle.release()