diff --git a/configure.ac b/configure.ac
--- a/configure.ac
+++ b/configure.ac
@@ -98,13 +98,14 @@
 
 dnl Add dependencies on files generated by configure.
 AC_SUBST([CONFIG_STATUS_DEPENDENCIES],
-  ['$(top_srcdir)/doc/Doxyfile.in $(top_srcdir)/lemon/lemon.pc.in $(top_srcdir)/cmake/version.cmake.in'])
+  ['$(top_srcdir)/doc/Doxyfile.in $(top_srcdir)/doc/mainpage.dox.in $(top_srcdir)/lemon/lemon.pc.in $(top_srcdir)/cmake/version.cmake.in'])
 
 AC_CONFIG_FILES([
 Makefile
 demo/Makefile
 cmake/version.cmake
 doc/Doxyfile
+doc/mainpage.dox
 lemon/lemon.pc
 ])