diff --git a/include/cutlass/epilogue/thread/activation.h b/include/cutlass/epilogue/thread/activation.h
index 5f8ba63e..0162b6e4 100644
--- a/include/cutlass/epilogue/thread/activation.h
+++ b/include/cutlass/epilogue/thread/activation.h
@@ -347,6 +347,7 @@ struct Sigmoid<Array<half_t, N>> {
 
   using Params = LinearCombinationGenericParams<T>;
 
+  CUTLASS_HOST_DEVICE
   Array<T, N> operator()(Array<T, N> const &z, Params const &params_) const {
     return this->operator()(z);
   }