diff --git a/examples/signaling-server-libdatachannel-ws/signaling-server.cpp b/examples/signaling-server-libdatachannel-ws/signaling-server.cpp
index 774953a0e..ec9a2838c 100644
--- a/examples/signaling-server-libdatachannel-ws/signaling-server.cpp
+++ b/examples/signaling-server-libdatachannel-ws/signaling-server.cpp
@@ -13,6 +13,7 @@
 #include <iostream>
 #include <memory>
 #include <string>
+#include <thread>
 #include <unordered_map>
 
 #include <nlohmann/json.hpp>