diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc
index 8e02f454b9..b02df5a35a 100644
--- a/src/arch/x86/Makefile.inc
+++ b/src/arch/x86/Makefile.inc
@@ -346,7 +346,7 @@ seabios:
 			HOSTCC="$(HOSTCC)" \
 			CC="$(CC_x86_32)" LD="$(LD_x86_32)" OBJDUMP="$(OBJDUMP_x86_32)" \
 			OBJCOPY="$(OBJCOPY_x86_32)" STRIP="$(STRIP_x86_32)" \
-			AS="$(AS_x86_32)" CPP="$(CPP)" \
+			AS="$(AS_x86_32)" \
 			CONFIG_SEABIOS_MASTER=$(CONFIG_SEABIOS_MASTER) \
 			CONFIG_SEABIOS_STABLE=$(CONFIG_SEABIOS_STABLE) \
 			CONFIG_SEABIOS_THREAD_OPTIONROMS=$(CONFIG_SEABIOS_THREAD_OPTIONROMS) \