diff --git a/binding-sandbox/binding-base.h b/binding-sandbox/binding-base.h
index c7100a85..6a010c9c 100644
--- a/binding-sandbox/binding-base.h
+++ b/binding-sandbox/binding-base.h
@@ -289,13 +289,7 @@ namespace mkxp_sandbox {
                     fiber->stack.pop_back();
                 }
                 ++fiber->stack_index;
-                b.stack_ptr = w2c_ruby_rb_wasm_get_stack_pointer(&b.instance())
-#ifdef MKXPZ_BIG_ENDIAN
-                    +
-#else
-                    -
-#endif // MKXPZ_BIG_ENDIAN
-                    CEIL_WASMSTACKALIGN(declared_slots_size<T>::value);
+                b.stack_ptr = w2c_ruby_rb_wasm_get_stack_pointer(&b.instance()) - CEIL_WASMSTACKALIGN(declared_slots_size<T>::value);
                 assert(b.stack_ptr % sizeof(VALUE) == 0);
                 assert(b.stack_ptr % WASMSTACKALIGN == 0);
                 if (declared_slots_size<T>::value != 0) {
@@ -339,16 +333,7 @@ namespace mkxp_sandbox {
 
                     assert(fiber->stack.size() == fiber->stack_index);
 
-                    w2c_ruby_rb_wasm_set_stack_pointer(
-                        &bind->instance(),
-                        fiber->stack.back().stack_ptr
-#ifdef MKXPZ_BIG_ENDIAN
-                            -
-#else
-                            +
-#endif // MKXPZ_BIG_ENDIAN
-                            CEIL_WASMSTACKALIGN(declared_slots_size<T>::value)
-                    );
+                    w2c_ruby_rb_wasm_set_stack_pointer(&bind->instance(), fiber->stack.back().stack_ptr + CEIL_WASMSTACKALIGN(declared_slots_size<T>::value));
                     bind->stack_ptr = fiber->stack.back().stack_ptr;
                     fiber->stack.pop_back();
                 }
diff --git a/libretro/sandbox-bindgen.rb b/libretro/sandbox-bindgen.rb
index 0dedece6..95fbe246 100644
--- a/libretro/sandbox-bindgen.rb
+++ b/libretro/sandbox-bindgen.rb
@@ -269,16 +269,6 @@ PRELUDE = <<~HEREDOC
 
   bindings::bindings(std::shared_ptr<struct w2c_#{MODULE_NAME}> m) : binding_base(m) {}
 
-  static wasm_ptr_t _sbindgen_stack_push(wasm_ptr_t frame_pointer, wasm_size_t num_bytes) {
-      return frame_pointer
-  #ifdef MKXPZ_BIG_ENDIAN
-          +
-  #else
-          -
-  #endif // MKXPZ_BIG_ENDIAN
-          num_bytes;
-  }
-
   static void _sbindgen_strcpy(char *dst, const char *src) {
   #ifdef MKXPZ_BIG_ENDIAN
       do {
@@ -522,7 +512,7 @@ File.readlines('tags', chomp: true).each do |line|
       coroutine_initializer += <<~HEREDOC
         {
             wasm_ptr_t fp = w2c_ruby_rb_wasm_get_stack_pointer(&bind.instance());
-            wasm_ptr_t sp = _sbindgen_stack_push(fp, CEIL_WASMSTACKALIGN(a#{args.length - 2} * sizeof(VALUE)));
+            wasm_ptr_t sp = fp - CEIL_WASMSTACKALIGN(a#{args.length - 2} * sizeof(VALUE));
             if (sp > fp) {
                 throw std::bad_alloc();
             }
@@ -549,7 +539,7 @@ File.readlines('tags', chomp: true).each do |line|
             do ++n; while (va_arg(b, VALUE));
             va_end(b);
             wasm_ptr_t fp = w2c_ruby_rb_wasm_get_stack_pointer(&bind.instance());
-            wasm_ptr_t sp = _sbindgen_stack_push(fp, CEIL_WASMSTACKALIGN(n * sizeof(VALUE)));
+            wasm_ptr_t sp = fp - CEIL_WASMSTACKALIGN(n * sizeof(VALUE));
             if (sp > fp) {
                 throw std::bad_alloc();
             }