diff --git a/firmware/l0dable/.gitignore b/firmware/l0dable/.gitignore
index 7652361..ca79c34 100644
--- a/firmware/l0dable/.gitignore
+++ b/firmware/l0dable/.gitignore
@@ -1,4 +1,4 @@
 *.elf
 *.bin
-*.h
+usetable.h
 loadable.ld
diff --git a/firmware/l0dable/Makefile b/firmware/l0dable/Makefile
index f4f6714..8da03dc 100644
--- a/firmware/l0dable/Makefile
+++ b/firmware/l0dable/Makefile
@@ -42,7 +42,7 @@ $(LDFILE):
 	$(OBJCOPY) $(OCFLAGS) -O binary $< $@
 
 clean:
-	rm -f *.o *.elf *.bin
+	rm -f *.o *.elf *.bin usetable.h
 
 IDIR=/cygdrive/f
 install:
@@ -50,6 +50,9 @@ install:
 
 $(OBJS): usetable.h
 
+usetable.h:
+	./mktable.pl
+
 .SUFFIXES:
 
 .PHONY: $(LDFILE)