diff --git a/configure.ac b/configure.ac
index b318c5d820..824732be19 100644
--- a/configure.ac
+++ b/configure.ac
@@ -302,14 +302,13 @@ if test "x$CXXFLAGS_overridden" = "xno"; then
   AX_CHECK_COMPILE_FLAG([-Wunused-local-typedef],[CXXFLAGS="$CXXFLAGS -Wno-unused-local-typedef"],,[[$CXXFLAG_WERROR]])
   AX_CHECK_COMPILE_FLAG([-Wdeprecated-register],[CXXFLAGS="$CXXFLAGS -Wno-deprecated-register"],,[[$CXXFLAG_WERROR]])
   AX_CHECK_COMPILE_FLAG([-Wimplicit-fallthrough],[CXXFLAGS="$CXXFLAGS -Wno-implicit-fallthrough"],,[[$CXXFLAG_WERROR]])
-
-  # Check for optional instruction set support. Enabling these does _not_ imply that all code will
-  # be compiled with them, rather that specific objects/libs may use them after checking for runtime
-  # compatibility.
-  AX_CHECK_COMPILE_FLAG([-msse4.2],[[SSE42_CXXFLAGS="-msse4.2"]],,[[$CXXFLAG_WERROR]])
-
 fi
 
+# Check for optional instruction set support. Enabling these does _not_ imply that all code will
+# be compiled with them, rather that specific objects/libs may use them after checking for runtime
+# compatibility.
+AX_CHECK_COMPILE_FLAG([-msse4.2],[[SSE42_CXXFLAGS="-msse4.2"]],,[[$CXXFLAG_WERROR]])
+
 TEMP_CXXFLAGS="$CXXFLAGS"
 CXXFLAGS="$CXXFLAGS $SSE42_CXXFLAGS"
 AC_MSG_CHECKING(for assembler crc32 support)