diff --git a/include/boost/predef/hardware/simd/x86/sse2.h b/include/boost/predef/hardware/simd/x86/sse2.h
index 7eaa3dd..915d4ae 100644
--- a/include/boost/predef/hardware/simd/x86/sse2.h
+++ b/include/boost/predef/hardware/simd/x86/sse2.h
@@ -9,4 +9,43 @@ http://www.boost.org/LICENSE_1_0.txt)
 #ifndef BOOST_PREDEF_HARDWARE_SIMD_X86_SSE2_H
 #define BOOST_PREDEF_HARDWARE_SIMD_X86_SSE2_H
 
+#include <boost/predef/version_number.h>
+
+/*`
+ [heading `BOOST_HW_SIMD_X86_SSE2`]
+
+ [@https://en.wikipedia.org/wiki/SSE2 SSE2] x86 extension.
+ Version number is: 2.0.0.
+
+ [table
+     [[__predef_symbol__] [__predef_version__]]
+
+     [[`__SSE2__`] [__predef_detection__]]
+     [[`_M_X64`] [__predef_detection__]]
+     [[`_M_IX86_FP >= 2`] [__predef_detection__]]
+     ]
+ */
+
+#define BOOST_HW_SIMD_X86_SSE2 BOOST_VERSION_NUMBER_NOT_AVAILABLE
+
+#if defined(__SSE2__) || defined(_M_X64) || _M_IX86_FP >= 2
+#   undef BOOST_HW_SIMD_X86_SSE2
+#   define BOOST_HW_SIMD_X86_SSE2 BOOST_VERSION_NUMBER(2, 0, 0)
+#   define BOOST_HW_SIMD_X86_SSE2_AVAILABLE
 #endif
+
+#define BOOST_HW_SIMD_X86_SSE2_NAME "SSE2"
+
+#if !defined(BOOST_HW_SIMD_X86) && defined(BOOST_HW_SIMD_X86_SSE2_AVAILABLE)
+#   define BOOST_HW_SIMD_X86 BOOST_HW_SIMD_X86_SSE2
+#   define BOOST_HW_SIMD_X86_NAME BOOST_HW_SIMD_X86_SSE2_NAME
+#endif
+
+#if defined(BOOST_HW_SIMD_X86_SSE2_AVAILABLE)
+#   include <emmintrin.h>
+#endif
+
+#endif
+
+#include <boost/predef/detail/test.h>
+BOOST_PREDEF_DECLARE_TEST(BOOST_HW_SIMD_X86_SSE2, BOOST_HW_SIMD_X86_SSE2_NAME)