diff --git a/unit_tests/operator/Test_MetaOperator.cpp b/unit_tests/operator/Test_MetaOperator.cpp
index a803e4ce88eb2cf93ad51663b011638a86d0c5d0..e9718fc694d29713797565d3ae8c8107cc7612de 100644
--- a/unit_tests/operator/Test_MetaOperator.cpp
+++ b/unit_tests/operator/Test_MetaOperator.cpp
@@ -12,6 +12,7 @@
 #include <catch2/catch_test_macros.hpp>
 
 #include "aidge/operator/MetaOperator.hpp"
+#include "aidge/operator/MetaOperatorDefs.hpp"
 #include "aidge/graph/GraphView.hpp"
 #include <cstddef>