diff --git a/Kbuild b/Kbuild
index 62af178..7e2e01f 100644
--- a/Kbuild
+++ b/Kbuild
@@ -3268,6 +3268,7 @@
 
 cppflags-$(CONFIG_HIF_CPU_PERF_AFFINE_MASK) += -DHIF_CPU_PERF_AFFINE_MASK
 cppflags-$(CONFIG_SMMU_S1_UNMAP) += -DCONFIG_SMMU_S1_UNMAP
+cppflags-$(CONFIG_GENERIC_SHADOW_REGISTER_ACCESS_ENABLE) += -DGENERIC_SHADOW_REGISTER_ACCESS_ENABLE
 
 KBUILD_CPPFLAGS += $(cppflags-y)