diff --git a/plat/xilinx/zynqmp/custom_sip_svc.c b/plat/xilinx/zynqmp/custom_sip_svc.c
index 459aa39..fbb0a33 100644
--- a/plat/xilinx/zynqmp/custom_sip_svc.c
+++ b/plat/xilinx/zynqmp/custom_sip_svc.c
@@ -15,3 +15,11 @@
 	WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid);
 	SMC_RET1(handle, SMC_UNK);
 }
+
+void custom_early_setup(void)
+{
+}
+
+void custom_mmap_add(void)
+{
+}