--- Makefile.in~	2009-12-07 13:46:26.000000000 +0100
+++ Makefile.in	2009-12-07 13:51:14.000000000 +0100
@@ -76,7 +76,7 @@
 y.tab.c y.tab.h: parsetime.y
 	$(YACC) -d parsetime.y
 
-lex.yy.c: parsetime.l
+lex.yy.c: parsetime.l y.tab.h
 	$(LEX) -i parsetime.l
 
 atd.service: atd.service.in