diff --git a/plugins/ipam/host-local/dns.go b/plugins/ipam/host-local/dns.go
index 1b3975a5..816c91f7 100644
--- a/plugins/ipam/host-local/dns.go
+++ b/plugins/ipam/host-local/dns.go
@@ -28,6 +28,7 @@ func parseResolvConf(filename string) (*types.DNS, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer fp.Close()
 
 	dns := types.DNS{}
 	scanner := bufio.NewScanner(fp)