diff --git a/arch/arm/mach-tegra/tegra20/Makefile b/arch/arm/mach-tegra/tegra20/Makefile
index 17c1990..72d82a5 100644
--- a/arch/arm/mach-tegra/tegra20/Makefile
+++ b/arch/arm/mach-tegra/tegra20/Makefile
@@ -10,7 +10,8 @@
 
 # The AVP is ARMv4T architecture so we must use special compiler
 # flags for any startup files it might use.
-CFLAGS_warmboot_avp.o += -march=armv4t
+CFLAGS_warmboot_avp.o = -march=armv4t -U__LINUX_ARM_ARCH__ \
+	-D__LINUX_ARM_ARCH__=4
 
 obj-y	+= clock.o funcmux.o pinmux.o
 obj-$(CONFIG_TEGRA_LP0) += warmboot.o crypto.o warmboot_avp.o