diff --git a/include/boost/core/detail/sp_thread_pause.hpp b/include/boost/core/detail/sp_thread_pause.hpp
index 01be1a0..8971fbd 100644
--- a/include/boost/core/detail/sp_thread_pause.hpp
+++ b/include/boost/core/detail/sp_thread_pause.hpp
@@ -20,7 +20,7 @@
 #include <boost/config.hpp>
 
 #if defined(__has_builtin)
-# if __has_builtin(__builtin_ia32_pause) && !defined(_INTEL_COMPILER)
+# if __has_builtin(__builtin_ia32_pause) && !defined(__INTEL_COMPILER)
 #  define BOOST_CORE_HAS_BUILTIN_IA32_PAUSE
 # endif
 #endif