diff --git a/cudax/cmake/cudaxHeaderTesting.cmake b/cudax/cmake/cudaxHeaderTesting.cmake
index 4887688f529..6411931b705 100644
--- a/cudax/cmake/cudaxHeaderTesting.cmake
+++ b/cudax/cmake/cudaxHeaderTesting.cmake
@@ -63,10 +63,6 @@ function(cudax_add_header_test label definitions)
         # FIXME: error: possibly dangling reference to a temporary (stream_task.cuh:114)
         cuda/experimental/__stf/stream/stream_task.cuh
         cuda/experimental/__stf/stream/stream_ctx.cuh
-
-        # FIXME: -Wvla: Avoid VLAs (cudaMemAccessDesc desc[ndevices];), they're non-portable:
-        cuda/experimental/__stf/graph/graph_ctx.cuh
-        cuda/experimental/stf.cuh
     )
     target_link_libraries(${headertest_target} PUBLIC ${cn_target})
     target_compile_definitions(${headertest_target} PRIVATE
diff --git a/cudax/include/cuda/experimental/__stf/graph/graph_ctx.cuh b/cudax/include/cuda/experimental/__stf/graph/graph_ctx.cuh
index 159d4e6e0d0..14ec758c857 100644
--- a/cudax/include/cuda/experimental/__stf/graph/graph_ctx.cuh
+++ b/cudax/include/cuda/experimental/__stf/graph/graph_ctx.cuh
@@ -118,7 +118,7 @@ private:
   {
     static const int ndevices = cuda_try<cudaGetDeviceCount>();
     // We need to declare who may access this buffer
-    cudaMemAccessDesc desc[ndevices];
+    ::std::vector<cudaMemAccessDesc> desc(ndevices);
     for (int peer : each(0, ndevices))
     {
       desc[peer].location.type = cudaMemLocationTypeDevice;
@@ -143,7 +143,7 @@ private:
 
     // Set only the variable parameters
     params.poolProps.location.id = device_ordinal(memory_node);
-    params.accessDescs           = desc;
+    params.accessDescs           = desc.data();
     params.accessDescCount       = size_t(ndevices);
     params.bytesize              = size_t(s);
 
diff --git a/cudax/include/cuda/experimental/__stf/utility/traits.cuh b/cudax/include/cuda/experimental/__stf/utility/traits.cuh
index e1046116465..2d987a10000 100644
--- a/cudax/include/cuda/experimental/__stf/utility/traits.cuh
+++ b/cudax/include/cuda/experimental/__stf/utility/traits.cuh
@@ -350,7 +350,7 @@ auto all_convertible(P&&... p)
  * @return T Either the first convertible parameter, or `default_v` if no such parameter is found
  */
 template <typename T, typename... P>
-T only_convertible_or(T default_v, P&&... p)
+T only_convertible_or([[maybe_unused]] T default_v, P&&... p)
 {
   if constexpr (!(::std::is_convertible_v<P, T> || ...))
   {