diff --git a/Makefile.am b/Makefile.am
index ee8815a3..9b30aa39 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -65,6 +65,7 @@ ell_headers = ell/util.h \
 
 ell_sources = ell/private.h \
 			ell/missing.h \
+			ell/useful.h \
 			ell/util.c \
 			ell/test.c \
 			ell/strv.c \