diff --git a/Kbuild b/Kbuild
index d048228..aa7fcb2 100644
--- a/Kbuild
+++ b/Kbuild
@@ -2236,8 +2236,8 @@
 #Set RX_PERFORMANCE
 cppflags-$(CONFIG_RX_PERFORMANCE) += -DRX_PERFORMANCE
 
-#Set QCS403_MEM_OPTIMIZE
-cppflags-$(CONFIG_QCS403_MEM_OPTIMIZE) += -DQCS403_MEM_OPTIMIZE
+#Set SLUB_MEM_OPTIMIZE
+cppflags-$(CONFIG_SLUB_MEM_OPTIMIZE) += -DSLUB_MEM_OPTIMIZE
 
 #Enable OL debug and wmi unified functions
 cppflags-$(CONFIG_ATH_PERF_PWR_OFFLOAD) += -DATH_PERF_PWR_OFFLOAD