diff --git a/Kbuild b/Kbuild
index ca2f403..749a6e8 100644
--- a/Kbuild
+++ b/Kbuild
@@ -645,6 +645,14 @@
 
 CDEFINES += -DFEATURE_WLAN_CH_AVOID
 
+ifeq ($(EXISTS_MSM_SMD),1)
+CDEFINES += -DEXISTS_MSM_SMD
+endif
+
+ifeq ($(EXISTS_MSM_SMSM),1)
+CDEFINES += -DEXISTS_MSM_SMSM
+endif
+
 # Fix build for GCC 4.7
 EXTRA_CFLAGS += -Wno-maybe-uninitialized -Wno-unused-function