diff --git a/rudder-ldap/SOURCES/Makefile b/rudder-ldap/SOURCES/Makefile
index df126b6ef..85b75d4b9 100644
--- a/rudder-ldap/SOURCES/Makefile
+++ b/rudder-ldap/SOURCES/Makefile
@@ -53,7 +53,14 @@ rudder-sources: rudder-sources.tar.bz2
 	tar -xjf rudder-sources.tar.bz2
 	mv rudder-sources-*/ rudder-sources/
 
-build: openldap-source rudder-sources
+PATCHES_SHA = $(shell find patches/ -type f | xargs | sha256sum)
+CACHE_PARAMETERS = --with-env name=openldap ldap=$(OPENLDAP_SHA256) patches=$(PATCHES_SHA)
+BUILD_LDAP = $(shell ../../build-caching get openldap-source/ $(CACHE_PARAMETERS) || echo build-ldap)
+build: $(BUILD_LDAP) rudder-sources
+	# save build into cache
+	[ "$(BUILD_LDAP)" != "" ] && ../../build-caching put openldap-source/ $(CACHE_PARAMETERS)
+
+build-ldap: openldap-source
 	cd openldap-source && ./configure --prefix=/opt/rudder --libdir=/opt/rudder/lib/ldap --enable-dynamic --enable-debug --enable-modules --enable-monitor=mod --enable-dynlist=mod --enable-mdb=yes --enable-hdb=no --enable-bdb=no
 	cd openldap-source && make depend
 	cd openldap-source && make