diff --git a/cli/compose/loader/merge.go b/cli/compose/loader/merge.go
index e72b6d5e30..b48d3452b9 100644
--- a/cli/compose/loader/merge.go
+++ b/cli/compose/loader/merge.go
@@ -126,7 +126,9 @@ func toServiceVolumeConfigsMap(s interface{}) (map[interface{}]interface{}, erro
 	}
 	m := map[interface{}]interface{}{}
 	for _, v := range volumes {
-		m[v.Target] = v
+		if _, exists := m[v.Target]; !exists {
+			m[v.Target] = v
+		}
 	}
 	return m, nil
 }