diff --git a/examples/wasm/iwasmt.c b/examples/wasm/iwasmt.c
index cf4e08947b..6bb488b088 100644
--- a/examples/wasm/iwasmt.c
+++ b/examples/wasm/iwasmt.c
@@ -73,29 +73,11 @@ int iwasm_bytecode_exec_main(uint8_t *bytecode, size_t bytecode_len, int argc, c
 bool iwasm_runtime_init(void)
 {
     RuntimeInitArgs init_args;
-/* chose allocator non defaults to system allocator */
-#define FUNC_ALLOC
-// #define POOL_ALLOC
-
     memset(&init_args, 0, sizeof(RuntimeInitArgs));
-#ifdef POOL_ALLOC
-    static char global_heap_buf[256 * 1024] = { 0 };//(256 kB)
-
-    init_args.mem_alloc_type = Alloc_With_Pool;
-    init_args.mem_alloc_option.pool.heap_buf = global_heap_buf;
-    init_args.mem_alloc_option.pool.heap_size = sizeof(global_heap_buf);
-#elif defined(FUNC_ALLOC)
-    init_args.mem_alloc_type = Alloc_With_Allocator;
-/*deactivate Wpedantic for some lines*/
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wpedantic"
-    init_args.mem_alloc_option.allocator.malloc_func = malloc;
-    init_args.mem_alloc_option.allocator.realloc_func = realloc;
-    init_args.mem_alloc_option.allocator.free_func = free;
-#pragma GCC diagnostic pop
-#else
+    /* using default system allocator, pool allocator and
+     * and allocator function hooks are available
+     * see <wamr>/core/iwasm/include/wasm_export.h l99..*/
     init_args.mem_alloc_type = Alloc_With_System_Allocator;
-#endif
 
     /* initialize runtime environment */
     if (!wasm_runtime_full_init(&init_args)) {