diff --git a/include/boost/predef/hardware/simd/x86.h b/include/boost/predef/hardware/simd/x86.h
index 0874bc4..b11d571 100644
--- a/include/boost/predef/hardware/simd/x86.h
+++ b/include/boost/predef/hardware/simd/x86.h
@@ -67,7 +67,7 @@ http://www.boost.org/LICENSE_1_0.txt)
 
      [[`__FMA__`] [BOOST_HW_SIMD_X86_FMA3_VERSION]]
 
-     [[`__AVX2__`] [BOOST_HW_SIMD_x86_AVX2_VERSION]]
+     [[`__AVX2__`] [BOOST_HW_SIMD_X86_AVX2_VERSION]]
      ]
 
  */
diff --git a/include/boost/predef/hardware/simd/x86_amd.h b/include/boost/predef/hardware/simd/x86_amd.h
index 60fd448..c80d1ce 100644
--- a/include/boost/predef/hardware/simd/x86_amd.h
+++ b/include/boost/predef/hardware/simd/x86_amd.h
@@ -33,13 +33,13 @@ http://www.boost.org/LICENSE_1_0.txt)
  [table
      [[__predef_symbol__] [__predef_version__]]
 
-     [[`__SSE4A__`] [BOOST_HW_SIMD_x86_SSE4A_VERSION]]
+     [[`__SSE4A__`] [BOOST_HW_SIMD_X86_SSE4A_VERSION]]
 
-     [[`__FMA4__`] [BOOST_HW_SIMD_x86_FMA4_VERSION]]
+     [[`__FMA4__`] [BOOST_HW_SIMD_X86_FMA4_VERSION]]
 
-     [[`__XOP__`] [BOOST_HW_SIMD_x86_XOP_VERSION]]
+     [[`__XOP__`] [BOOST_HW_SIMD_X86_XOP_VERSION]]
 
-     [[`BOOST_HW_SIMD_X86`] [BOOST_HW_SIMD_x86]]
+     [[`BOOST_HW_SIMD_X86`] [BOOST_HW_SIMD_X86]]
      ]
 
  [note This predef includes every other x86 SIMD extensions and also has other