diff --git a/Kbuild b/Kbuild
index bf4bd92..8755980 100644
--- a/Kbuild
+++ b/Kbuild
@@ -2257,6 +2257,9 @@
 #Set RX_PERFORMANCE
 cppflags-$(CONFIG_RX_PERFORMANCE) += -DRX_PERFORMANCE
 
+#Set MULTI_IF_LOG
+cppflags-$(CONFIG_MULTI_IF_LOG) += -DMULTI_IF_LOG
+
 #Set SLUB_MEM_OPTIMIZE
 cppflags-$(CONFIG_SLUB_MEM_OPTIMIZE) += -DSLUB_MEM_OPTIMIZE