diff --git a/include/boost/predef/hardware/simd.h b/include/boost/predef/hardware/simd.h
index bc4e010..bb91a7a 100644
--- a/include/boost/predef/hardware/simd.h
+++ b/include/boost/predef/hardware/simd.h
@@ -61,3 +61,6 @@ http://www.boost.org/LICENSE_1_0.txt)
 #endif
 
 #endif
+
+#include <boost/predef/detail/test.h>
+BOOST_PREDEF_DECLARE_TEST(BOOST_HW_SIMD, BOOST_HW_SIMD_NAME)
diff --git a/include/boost/predef/hardware/simd/arm.h b/include/boost/predef/hardware/simd/arm.h
index 78b2551..0725784 100644
--- a/include/boost/predef/hardware/simd/arm.h
+++ b/include/boost/predef/hardware/simd/arm.h
@@ -38,3 +38,6 @@ http://www.boost.org/LICENSE_1_0.txt)
 #endif
 
 #endif
+
+#include <boost/predef/detail/test.h>
+BOOST_PREDEF_DECLARE_TEST(BOOST_HW_SIMD_ARM, BOOST_HW_SIMD_ARM_NAME)
diff --git a/include/boost/predef/hardware/simd/ppc.h b/include/boost/predef/hardware/simd/ppc.h
index dbbcdd7..e664dce 100644
--- a/include/boost/predef/hardware/simd/ppc.h
+++ b/include/boost/predef/hardware/simd/ppc.h
@@ -41,3 +41,6 @@ http://www.boost.org/LICENSE_1_0.txt)
 #endif
 
 #endif
+
+#include <boost/predef/detail/test.h>
+BOOST_PREDEF_DECLARE_TEST(BOOST_HW_SIMD_PPC, BOOST_HW_SIMD_PPC_NAME)
diff --git a/include/boost/predef/hardware/simd/x86.h b/include/boost/predef/hardware/simd/x86.h
index 8fb0698..7bb6e6f 100644
--- a/include/boost/predef/hardware/simd/x86.h
+++ b/include/boost/predef/hardware/simd/x86.h
@@ -52,3 +52,6 @@ http://www.boost.org/LICENSE_1_0.txt)
 #endif
 
 #endif
+
+#include <boost/predef/detail/test.h>
+BOOST_PREDEF_DECLARE_TEST(BOOST_HW_SIMD_X86, BOOST_HW_SIMD_X86_NAME)