diff --git a/libs/binder/TextOutput.cpp b/libs/binder/TextOutput.cpp
index 9637334..db3e858 100644
--- a/libs/binder/TextOutput.cpp
+++ b/libs/binder/TextOutput.cpp
@@ -18,6 +18,9 @@
 
 #include <binder/Debug.h>
 
+#include <utils/String8.h>
+#include <utils/String16.h>
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -119,6 +122,18 @@
     return to;
 }
 
+TextOutput& operator<<(TextOutput& to, const String8& val)
+{
+    to << val.string();
+    return to;
+}
+
+TextOutput& operator<<(TextOutput& to, const String16& val)
+{
+    to << String8(val).string();
+    return to;
+}
+
 static void textOutputPrinter(void* cookie, const char* txt)
 {
     ((TextOutput*)cookie)->print(txt, strlen(txt));