diff --git a/contrib/slapd-modules/autogroup/Makefile b/contrib/slapd-modules/autogroup/Makefile
index 5cee54ef5a..3c1f1d2151 100644
--- a/contrib/slapd-modules/autogroup/Makefile
+++ b/contrib/slapd-modules/autogroup/Makefile
@@ -1,3 +1,5 @@
+LIBTOOL=../../../libtool
+
 CPPFLAGS+=-I../../../include -I../../../servers/slapd
 
 all: autogroup.la