diff --git a/paddle/strings/stringpiece.h b/paddle/strings/stringpiece.h
index 89aa084a2920c6f372b771e0e407b64728ea69e4..adff713e86f49349b8f189c1d24584bfc1bb8aa7 100644
--- a/paddle/strings/stringpiece.h
+++ b/paddle/strings/stringpiece.h
@@ -16,6 +16,7 @@
 
 #pragma once
 
+#include <ostream>
 #include <string>
 
 namespace paddle {