diff --git a/lemon/Makefile.am b/lemon/Makefile.am
--- a/lemon/Makefile.am
+++ b/lemon/Makefile.am
@@ -61,6 +61,7 @@
 	lemon/clp.h \
 	lemon/color.h \
 	lemon/concept_check.h \
+	lemon/config.h \
 	lemon/connectivity.h \
 	lemon/counter.h \
 	lemon/core.h \