diff --git a/include/alpaka/mem/buf/BufUniformCudaHipRt.hpp b/include/alpaka/mem/buf/BufUniformCudaHipRt.hpp
index 649812097cba..826edaba7b1e 100644
--- a/include/alpaka/mem/buf/BufUniformCudaHipRt.hpp
+++ b/include/alpaka/mem/buf/BufUniformCudaHipRt.hpp
@@ -78,7 +78,7 @@ namespace alpaka
                 "The dimensionality of TExtent and the dimensionality of the TDim template parameter have to be "
                 "identical!");
             static_assert(
-                std::is_same_v<TIdx, Idx<TExtent>>,
+                std::is_same_v<TIdx, alpaka::Idx<TExtent>>,
                 "The idx type of TExtent and the TIdx template parameter have to be identical!");
         }
 
diff --git a/include/alpaka/mem/view/ViewSubView.hpp b/include/alpaka/mem/view/ViewSubView.hpp
index 88857b08cec1..a35fa22b4b65 100644
--- a/include/alpaka/mem/view/ViewSubView.hpp
+++ b/include/alpaka/mem/view/ViewSubView.hpp
@@ -53,23 +53,23 @@ namespace alpaka
                 "The dev type of TView and the Dev template parameter have to be identical!");
 
             static_assert(
-                std::is_same_v<TIdx, Idx<View>>,
+                std::is_same_v<TIdx, alpaka::Idx<View>>,
                 "The idx type of TView and the TIdx template parameter have to be identical!");
             static_assert(
-                std::is_same_v<TIdx, Idx<TExtent>>,
+                std::is_same_v<TIdx, alpaka::Idx<TExtent>>,
                 "The idx type of TExtent and the TIdx template parameter have to be identical!");
             static_assert(
-                std::is_same_v<TIdx, Idx<TOffsets>>,
+                std::is_same_v<TIdx, alpaka::Idx<TOffsets>>,
                 "The idx type of TOffsets and the TIdx template parameter have to be identical!");
 
             static_assert(
-                std::is_same_v<TDim, Dim<View>>,
+                std::is_same_v<TDim, alpaka::Dim<View>>,
                 "The dim type of TView and the TDim template parameter have to be identical!");
             static_assert(
-                std::is_same_v<TDim, Dim<TExtent>>,
+                std::is_same_v<TDim, alpaka::Dim<TExtent>>,
                 "The dim type of TExtent and the TDim template parameter have to be identical!");
             static_assert(
-                std::is_same_v<TDim, Dim<TOffsets>>,
+                std::is_same_v<TDim, alpaka::Dim<TOffsets>>,
                 "The dim type of TOffsets and the TDim template parameter have to be identical!");
 
             ALPAKA_ASSERT(((m_offsetsElements + m_extentElements) <= getExtents(view)).all());