diff --git a/deep_gemm/mega/__init__.py b/deep_gemm/mega/__init__.py
index 4178dd7..ced23f8 100644
--- a/deep_gemm/mega/__init__.py
+++ b/deep_gemm/mega/__init__.py
@@ -175,9 +175,10 @@ def transform_nvfp4_weights_for_mega_moe(
     
     # L1: interleave gate/up, then pack + transpose SF for UTCCP
     l1_interleaved = _interleave_l1_weights((l1_weights[0], l1_sf))
-    l1_out = (l1_interleaved[0], _pack_nvfp4_sf_for_utccp(l1_interleaved[1]))
+    # DeepGEMM expects int8 (kPackedFP4 = torch.kInt8), but NVFP4 weights are uint8
+    l1_out = (l1_interleaved[0].view(torch.int8), _pack_nvfp4_sf_for_utccp(l1_interleaved[1]))
     # L2: only pack + transpose SF for UTCCP
-    l2_out = (l2_weights[0], _pack_nvfp4_sf_for_utccp(l2_sf))
+    l2_out = (l2_weights[0].view(torch.int8), _pack_nvfp4_sf_for_utccp(l2_sf))
     return l1_out, l2_out