diff --git a/config-wrt32x b/config-wrt32x
index 113d92e1..384ac04c 100644
--- a/config-wrt32x
+++ b/config-wrt32x
@@ -3,3 +3,5 @@ CONFIG_TARGET_mvebu_cortexa9=y
 CONFIG_TARGET_mvebu_cortexa9_DEVICE_linksys_wrt32x=y
 CONFIG_PACKAGE_kmod-6lowpan=y
 CONFIG_PACKAGE_luci-app-advanced-reboot=y
+# CONFIG_KERNEL_CC_OPTIMIZE_FOR_PERFORMANCE is not set
+CONFIG_KERNEL_CC_OPTIMIZE_FOR_SIZE=y
\ No newline at end of file