diff --git a/Kbuild b/Kbuild
index b234de9..b726568 100644
--- a/Kbuild
+++ b/Kbuild
@@ -2435,6 +2435,7 @@
 cppflags-$(CONFIG_CREDIT_REP_THROUGH_CREDIT_UPDATE) += -DCONFIG_CREDIT_REP_THROUGH_CREDIT_UPDATE
 cppflags-$(CONFIG_RX_PN_CHECK_OFFLOAD) += -DCONFIG_RX_PN_CHECK_OFFLOAD
 
+cppflags-$(CONFIG_WLAN_SYNC_TSF_TIMER) += -DWLAN_FEATURE_TSF_TIMER_SYNC
 cppflags-$(CONFIG_WLAN_SYNC_TSF_PTP) += -DWLAN_FEATURE_TSF_PTP
 cppflags-$(CONFIG_WLAN_SYNC_TSF_PLUS_EXT_GPIO_IRQ) += -DWLAN_FEATURE_TSF_PLUS_EXT_GPIO_IRQ
 cppflags-$(CONFIG_WLAN_SYNC_TSF_PLUS_EXT_GPIO_SYNC) += -DWLAN_FEATURE_TSF_PLUS_EXT_GPIO_SYNC