diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk
index 584542c..d6c09de 100644
--- a/make_helpers/defaults.mk
+++ b/make_helpers/defaults.mk
@@ -240,6 +240,10 @@
 # region, platform Makefile is free to override this value.
 SEPARATE_BL2_NOLOAD_REGION	:= 0
 
+# Put RW DATA sections (.rwdata) in a separate memory region, which may be
+# discontiguous from the rest of BL31.
+SEPARATE_RWDATA_REGION		:= 0
+
 # Put SIMD context data structures in a separate memory region. Platforms
 # have the choice to put it outside of default BSS region of EL3 firmware.
 SEPARATE_SIMD_SECTION		:= 0