diff --git a/test/config_info.cpp b/test/config_info.cpp
index 1c9fcdc6..80faff53 100644
--- a/test/config_info.cpp
+++ b/test/config_info.cpp
@@ -157,6 +157,7 @@ void print_compiler_macros()
   PRINT_MACRO(__STDC_VERSION__);
   PRINT_MACRO(__GNUG__);
   PRINT_MACRO(__STRICT_ANSI__);
+  PRINT_MACRO(__GXX_EXPERIMENTAL_CXX0X__);
   PRINT_MACRO(__VERSION__);
   PRINT_MACRO(__OPTIMIZE__);
   PRINT_MACRO(__CHAR_UNSIGNED__);