diff --git a/lib/psci/psci_lib.mk b/lib/psci/psci_lib.mk
index 29080db..1d4aac4 100644
--- a/lib/psci/psci_lib.mk
+++ b/lib/psci/psci_lib.mk
@@ -17,6 +17,7 @@
 				lib/psci/psci_main.c			\
 				lib/psci/psci_setup.c			\
 				lib/psci/psci_system_off.c		\
+				lib/psci/psci_mem_protect.c		\
 				lib/psci/${ARCH}/psci_helpers.S
 
 ifeq (${ARCH}, aarch64)