diff --git a/include/boost/detail/spinlock_sync.hpp b/include/boost/detail/spinlock_sync.hpp
index d602365..a752396 100644
--- a/include/boost/detail/spinlock_sync.hpp
+++ b/include/boost/detail/spinlock_sync.hpp
@@ -17,6 +17,10 @@
 
 #include <boost/detail/yield_k.hpp>
 
+#if defined( __ia64__ ) && defined( __INTEL_COMPILER )
+# include <ia64intrin.h>
+#endif
+
 namespace boost
 {