--- a/drivers/dahdi/opvxa1200/Kbuild
+++ b/drivers/dahdi/opvxa1200/Kbuild
@@ -1,6 +1,6 @@
 obj-$(DAHDI_BUILD_ALL)$(CONFIG_DAHDI_OPVXA1200) += opvxa1200.o
 
-EXTRA_CFLAGS += -I$(src)/.. -Wno-undef
+EXTRA_CFLAGS += -I$(src)/.. -Wno-undef -Wno-error=unused-variable
 
 opvxa1200-objs := base.o