diff --git a/SConstruct b/SConstruct
index c8f5442c1..022ab32b9 100644
--- a/SConstruct
+++ b/SConstruct
@@ -394,6 +394,7 @@ help:assume compiler supports __attribute__((always_inline))
 		macro_name = '__attribute_always_inline()'
 		macro_value = '__attribute__((__always_inline__))'
 		self._check_macro(context,macro_name=macro_name,macro_value=macro_value,test=macro_name + 'static inline void a(){}', main='a();', msg='for function __attribute__((always_inline))')
+	@_custom_test
 	def check_attribute_alloc_size(self,context):
 		"""
 help:assume compiler supports __attribute__((alloc_size))