diff --git a/drivers/net/wireless/qualcomm/wcn39xx/qcacld-3.0/Kbuild b/drivers/net/wireless/qualcomm/wcn39xx/qcacld-3.0/Kbuild
index 951862c31c59..54ab4ad22aff 100755
--- a/drivers/net/wireless/qualcomm/wcn39xx/qcacld-3.0/Kbuild
+++ b/drivers/net/wireless/qualcomm/wcn39xx/qcacld-3.0/Kbuild
@@ -2977,7 +2977,9 @@ cppflags-$(CONFIG_WLAN_HANG_EVENT) += -DHIF_BUS_LOG_INFO
 cppflags-$(CONFIG_WLAN_HANG_EVENT) += -DDP_SUPPORT_RECOVERY_NOTIFY
 #endof dummy flags
 
-ccflags-$(CONFIG_ENABLE_SIZE_OPTIMIZE) += -Os
+ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
+ccflags-y += -O2
+endif
 
 # DFS component
 cppflags-$(CONFIG_WLAN_DFS_STATIC_MEM_ALLOC) += -DWLAN_DFS_STATIC_MEM_ALLOC