diff --git a/test/support/count_new.hpp b/test/support/count_new.hpp
index 72d4bc4f3..dac99e052 100644
--- a/test/support/count_new.hpp
+++ b/test/support/count_new.hpp
@@ -6,7 +6,7 @@
 # include <new>
 
 #ifndef __has_feature
-#  define __has_feature(x)
+#  define __has_feature(x) 0
 #endif
 
 #if  __has_feature(address_sanitizer) \