diff --git a/csbindgen-tests/src/lib.rs b/csbindgen-tests/src/lib.rs
index 1ac903a..fc23f84 100644
--- a/csbindgen-tests/src/lib.rs
+++ b/csbindgen-tests/src/lib.rs
@@ -178,13 +178,17 @@ pub extern "C" fn test_func_issue_39(_f: extern "C" fn(i32)){
 pub extern "C" fn test_func_issue_39_variation1(_f: extern "C" fn(i32, i32, i32)){
 }
 
-#[no_mangle]
-pub extern "C" fn nonnull_parameter(_output_word_uuid: NonNull<[u8; 16]>){
-}
+// #[no_mangle]
+// pub extern "C" fn nonnull_parameter(_output_word_uuid: NonNull<[u8; 16]>){
+// }
 
-#[no_mangle]
-pub extern "C" fn non_nonnull_parameter(_output_word_uuid: [u8; 16]){
-}
+// #[no_mangle]
+// pub extern "C" fn non_nonnull_parameter(_output_word_uuid: [u8; 16]){
+// }
+
+// #[no_mangle]
+// pub extern "C" fn non_nonnull_parameter2(_output_word_uuid: NonNull<u8>){
+// }
 
 #[no_mangle]
 pub extern "C" fn ge(_f: extern "C" fn(i32, i32, i32)){
diff --git a/dotnet-sandbox/NativeMethods.cs b/dotnet-sandbox/NativeMethods.cs
index b64dd39..6b00708 100644
--- a/dotnet-sandbox/NativeMethods.cs
+++ b/dotnet-sandbox/NativeMethods.cs
@@ -58,6 +58,9 @@ namespace CsBindgen
         [DllImport(__DllName, EntryPoint = "non_nonnull_parameter", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
         public static extern void non_nonnull_parameter(void/* byte[] */ _output_word_uuid);
 
+        [DllImport(__DllName, EntryPoint = "non_nonnull_parameter2", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
+        public static extern void non_nonnull_parameter2(byte _output_word_uuid);
+
         [DllImport(__DllName, EntryPoint = "ge", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
         public static extern void ge(delegate* unmanaged[Cdecl]<int, int, int, void> _f);