diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk
index 8c884b4..584542c 100644
--- a/make_helpers/defaults.mk
+++ b/make_helpers/defaults.mk
@@ -409,3 +409,6 @@
 # Allow platforms to save/restore DSU PMU registers over a power cycle.
 # Disabled by default and must be enabled by individual platforms.
 PRESERVE_DSU_PMU_REGS		:= 0
+
+# Enable RMMD to forward attestation requests from RMM to EL3.
+RMMD_ENABLE_EL3_TOKEN_SIGN	:= 0