diff --git a/p9_cfam.hpp b/p9_cfam.hpp
index d8fa5ff..07b251d 100644
--- a/p9_cfam.hpp
+++ b/p9_cfam.hpp
@@ -11,6 +11,7 @@
 static constexpr uint16_t P9_FSI2PIB_INTERRUPT     = 0x100B;
 static constexpr uint16_t P9_FSI2PIB_TRUE_MASK     = 0x100D;
 static constexpr uint16_t P9_CBS_CS                = 0x2801;
+static constexpr uint16_t P9_SBE_CTRL_STATUS       = 0x2808;
 static constexpr uint16_t P9_ROOT_CTRL0            = 0x2810;
 static constexpr uint16_t P9_PERV_CTRL0            = 0x281A;
 static constexpr uint16_t P9_SCRATCH_REGISTER_8    = 0x283F;