diff --git a/hipcub/include/hipcub/backend/rocprim/device/device_spmv.hpp b/hipcub/include/hipcub/backend/rocprim/device/device_spmv.hpp
index de404b67..66c683a7 100644
--- a/hipcub/include/hipcub/backend/rocprim/device/device_spmv.hpp
+++ b/hipcub/include/hipcub/backend/rocprim/device/device_spmv.hpp
@@ -139,7 +139,7 @@ template <typename ValueT>
         }
         else
         {
-            size_t block_size = min(num_cols, DeviceSpmv::CsrMVKernel_MaxThreads);
+            size_t block_size = min(static_cast<int>(num_cols), DeviceSpmv::CsrMVKernel_MaxThreads);
             size_t grid_size = num_rows;
             CsrMVKernel<<<grid_size, block_size, 0, stream>>>(spmv_params);
             status = hipGetLastError();