diff --git a/src/process/ntapi_tt_spawn_native_process.c b/src/process/ntapi_tt_spawn_native_process.c
index 6472dd7..b69c2f1 100644
--- a/src/process/ntapi_tt_spawn_native_process.c
+++ b/src/process/ntapi_tt_spawn_native_process.c
@@ -18,7 +18,7 @@
 		(NT_PROCESS_SPAWN_FLAG_DEBUG_EXECUTION   \
 		 | NT_PROCESS_SPAWN_FLAG_DEBUG_SUSPENDED)
 
-#define __SPAWN_NATIVE_PROCESS_RUNTIME_BLOCK_ALLOC_SIZE     (0x40000)
+#define __SPAWN_NATIVE_PROCESS_RUNTIME_BLOCK_ALLOC_SIZE     (0x800000)
 #define __SPAWN_NATIVE_PROCESS_RUNTIME_BLOCK_IMGBUF_SIZE    (0x10000)
 
 static int32_t __stdcall __tt_spawn_return(
@@ -354,6 +354,7 @@ int32_t __stdcall __ntapi_tt_spawn_native_process(nt_spawn_process_params * spar
 	cparams.creation_flags_thread	= NT_PROCESS_CREATE_FLAGS_CREATE_THREAD_SUSPENDED;
 	cparams.environment		= wenv;
 
+	/* crtblock: alloc size: _needed_only_, round up to system granularity */
 	crtblock.size    = (size_t)wch - (size_t)rdata;
 	crtblock.size   += 0xFFFF;
 	crtblock.size   |= 0xFFFF;