diff --git a/xplat/Flipper/ConnectionContextStore.cpp b/xplat/Flipper/ConnectionContextStore.cpp
index a61de8996..bc0e059cd 100644
--- a/xplat/Flipper/ConnectionContextStore.cpp
+++ b/xplat/Flipper/ConnectionContextStore.cpp
@@ -10,6 +10,7 @@
 #include <folly/portability/SysStat.h>
 #include <fstream>
 #include <iostream>
+#include <sstream>
 #include "CertificateUtils.h"
 #include "Log.h"