diff --git a/tests/unit/modules/protocol/test_protocol.cpp b/tests/unit/modules/protocol/test_protocol.cpp
index 97682b8..deb3893 100644
--- a/tests/unit/modules/protocol/test_protocol.cpp
+++ b/tests/unit/modules/protocol/test_protocol.cpp
@@ -2,6 +2,7 @@
 #include "../logic/error_codes.h"
 #include "../logic/progress_codes.h"
 #include "protocol.h"
+#include <array>
 
 using Catch::Matchers::Equals;