diff --git a/cub/agent/agent_scan.cuh b/cub/agent/agent_scan.cuh
index 8e265d6c0..e8869034c 100644
--- a/cub/agent/agent_scan.cuh
+++ b/cub/agent/agent_scan.cuh
@@ -184,22 +184,21 @@ struct AgentScan
   typedef BlockScanRunningPrefixOp<AccumT, ScanOpT> RunningPrefixCallbackOp;
 
   // Shared memory type for this thread block
-  union _TempStorage
+  struct _TempStorage
   {
-    // Smem needed for tile loading
-    typename BlockLoadT::TempStorage load;
-
-    // Smem needed for tile storing
-    typename BlockStoreT::TempStorage store;
-
-    struct ScanStorage
-    {
-      // Smem needed for cooperative prefix callback
-      typename TilePrefixCallbackOpT::TempStorage prefix;
+    union {
+      // Smem needed for tile loading
+      typename BlockLoadT::TempStorage load;
 
+      // Smem needed for tile storing
+      typename BlockStoreT::TempStorage store;
+      
       // Smem needed for tile scanning
       typename BlockScanT::TempStorage scan;
-    } scan_storage;
+    };
+
+    // Smem needed for cooperative prefix callback
+    typename TilePrefixCallbackOpT::TempStorage prefix;
   };
 
   // Alias wrapper allowing storage to be unioned
@@ -229,7 +228,7 @@ struct AgentScan
                                            AccumT &block_aggregate,
                                            Int2Type<false> /*is_inclusive*/)
   {
-    BlockScanT(temp_storage.scan_storage.scan)
+    BlockScanT(temp_storage.scan)
       .ExclusiveScan(items, items, init_value, scan_op, block_aggregate);
     block_aggregate = scan_op(init_value, block_aggregate);
   }
@@ -243,7 +242,7 @@ struct AgentScan
                                            AccumT &block_aggregate,
                                            Int2Type<true> /*is_inclusive*/)
   {
-    BlockScanT(temp_storage.scan_storage.scan)
+    BlockScanT(temp_storage.scan)
       .InclusiveScan(items, items, scan_op, block_aggregate);
   }
 
@@ -256,7 +255,7 @@ struct AgentScan
                                            PrefixCallback &prefix_op,
                                            Int2Type<false> /*is_inclusive*/)
   {
-    BlockScanT(temp_storage.scan_storage.scan)
+    BlockScanT(temp_storage.scan)
       .ExclusiveScan(items, items, scan_op, prefix_op);
   }
 
@@ -269,7 +268,7 @@ struct AgentScan
                                            PrefixCallback &prefix_op,
                                            Int2Type<true> /*is_inclusive*/)
   {
-    BlockScanT(temp_storage.scan_storage.scan)
+    BlockScanT(temp_storage.scan)
       .InclusiveScan(items, items, scan_op, prefix_op);
   }
 
@@ -334,7 +333,7 @@ struct AgentScan
   {
     // Reset dsmem
     TilePrefixCallbackOpT prefix_op(tile_state,
-                                    temp_storage.scan_storage.prefix,
+                                    temp_storage.prefix,
                                     scan_op,
                                     tile_idx);
     prefix_op.InitializeDSMem();