diff --git a/Kbuild b/Kbuild
index b532f3e..cb306e0 100644
--- a/Kbuild
+++ b/Kbuild
@@ -2815,6 +2815,7 @@
 cppflags-$(CONFIG_LITHIUM) += -DSERIALIZE_QUEUE_SETUP
 cppflags-$(CONFIG_LITHIUM) += -DDP_RX_PKT_NO_PEER_DELIVER
 cppflags-$(CONFIG_LITHIUM) += -DFEATURE_ALIGN_STATS_FROM_DP
+cppflags-$(CONFIG_LITHIUM) += -DDROP_RXDMA_DECRYPT_ERR
 cppflags-$(CONFIG_VERBOSE_DEBUG) += -DENABLE_VERBOSE_DEBUG
 cppflags-$(CONFIG_RX_DESC_DEBUG_CHECK) += -DRX_DESC_DEBUG_CHECK
 cppflags-$(CONFIG_REGISTER_OP_DEBUG) += -DHAL_REGISTER_WRITE_DEBUG