diff --git a/Makefile.am b/Makefile.am
index 6a45d725..e176c96c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -19,8 +19,8 @@ SUBDIRS = macros src $(PLUGINS) $(SERVERTEST)
 
 ## to automatically rebuild aclocal.m4 if any of the macros in
 ## `macros/' change
-@MAINT@include macros/macros.dep
-@MAINT@macros/macros.dep: macros/Makefile.am
+@MAINT@include $(srcdir)/macros/macros.dep
+@MAINT@$(srcdir)macros/macros.dep: $(srcdir)/macros/Makefile.am
 @MAINT@	cd macros && $(MAKE) macros.dep
 
 if HAVE_GNOME