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-rw-r--r--dts/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/dts/Makefile b/dts/Makefile
index ccd552fa003..3cf991eaf2f 100644
--- a/dts/Makefile
+++ b/dts/Makefile
@@ -21,7 +21,7 @@ DTS_INCDIRS = $(SRCTREE)/board/$(VENDOR)/$(BOARD)/dts
DTS_INCDIRS += $(SRCTREE)/board/$(VENDOR)/dts
DTS_INCDIRS += $(SRCTREE)/arch/$(ARCH)/dts
-DTS_CPPFLAGS := -x assembler-with-cpp \
+DTS_CPPFLAGS := -x assembler-with-cpp -undef -D__DTS__ \
-nostdinc $(addprefix -I,$(DTS_INCDIRS))
DTC_FLAGS := -R 4 -p 0x1000 \