diff --git a/src/mlpack/methods/ann/layer/sequential_impl.hpp b/src/mlpack/methods/ann/layer/sequential_impl.hpp
index 26669b3b5e..0a89f8be10 100644
--- a/src/mlpack/methods/ann/layer/sequential_impl.hpp
+++ b/src/mlpack/methods/ann/layer/sequential_impl.hpp
@@ -98,7 +98,7 @@ Sequential<
 template<typename InputDataType, typename OutputDataType, bool Residual,
          typename... CustomLayers>
 template<typename eT>
-size_t Sequential(InputDataType, OutputDataType, Residual, CustomLayers...)::
+size_t Sequential<InputDataType, OutputDataType, Residual, CustomLayers...>::
 InputShape() const
 {
   size_t inputShape = 0;