diff --git a/Kbuild b/Kbuild
index ca146564b4c8..c0a9de6b04f7 100644
--- a/Kbuild
+++ b/Kbuild
@@ -3051,7 +3051,6 @@ cppflags-$(CONFIG_LITHIUM) += -DPEER_PROTECTED_ACCESS
 cppflags-$(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_LITHIUM) += -DDP_RX_SPECIAL_FRAME_NEED
 cppflags-$(CONFIG_LITHIUM) += -DFEATURE_STATS_EXT_V2
 cppflags-$(CONFIG_VERBOSE_DEBUG) += -DENABLE_VERBOSE_DEBUG