diff --git a/Makefile b/Makefile
index b4bebf1..c8ffdab 100644
--- a/Makefile
+++ b/Makefile
@@ -964,6 +964,7 @@
         ENABLE_FEAT_RNG \
         ENABLE_FEAT_SB \
         PSA_FWU_SUPPORT \
+        ENABLE_TRBE_FOR_NS \
 )))
 
 $(eval $(call assert_numerics,\
@@ -1064,6 +1065,7 @@
         NR_OF_FW_BANKS \
         NR_OF_IMAGES_IN_FW_BANK \
         PSA_FWU_SUPPORT \
+        ENABLE_TRBE_FOR_NS \
 )))
 
 ifeq (${SANITIZE_UB},trap)