diff --git a/include/proto/backend.h b/include/proto/backend.h
index 901d9f4..56df516 100644
--- a/include/proto/backend.h
+++ b/include/proto/backend.h
@@ -63,6 +63,8 @@
 		return 0;
 	if (srv->admin & SRV_ADMF_MAINT)
 		return 0;
+	if (srv->admin & SRV_ADMF_DRAIN)
+		return 0;
 	switch (state) {
 	case SRV_ST_STARTING:
 	case SRV_ST_RUNNING:
@@ -85,6 +87,8 @@
 		return 0;
 	if (srv->prev_admin & SRV_ADMF_MAINT)
 		return 0;
+	if (srv->prev_admin & SRV_ADMF_DRAIN)
+		return 0;
 	switch (state) {
 	case SRV_ST_STARTING:
 	case SRV_ST_RUNNING: