--- rpl/modules/sets/Makefile.am	2017/07/30 21:59:02	1.7
+++ rpl/modules/sets/Makefile.am	2017/08/04 08:19:04	1.8
@@ -27,6 +27,7 @@ clean:
 	@gfortran -x c -fPIC -Wall -DRPLCONFIG -O2 -g -funsigned-char \
 			-I$(top_srcdir) -I$(top_builddir)/src \
 			-DREADLINE_LIBRARY \
+			-I$(top_builddir) \
 			-I$(top_srcdir)/tools/@READLINE@ \
 			-I$(top_builddir)/tools/@READLINE@ \
 			-I$(top_builddir)/tools/@GSL@ \