diff --git a/plat/nvidia/tegra/platform.mk b/plat/nvidia/tegra/platform.mk
index eaf1091..9a9e79e 100644
--- a/plat/nvidia/tegra/platform.mk
+++ b/plat/nvidia/tegra/platform.mk
@@ -36,4 +36,4 @@
 BUILD_PLAT	:=	${BUILD_BASE}/${PLAT}/${TARGET_SOC}/${BUILD_TYPE}
 
 # enable signed comparison checks
-CFLAGS		+= -Wsign-compare
+TF_CFLAGS	+= -Wsign-compare