diff --git a/unit_tests/operator/Test_MetaOperator.cpp b/unit_tests/operator/Test_MetaOperator.cpp
index 4fe396303c8cfae88c885c62b4479ee9c52fb54a..adc548b9148ce8431d51f514ac82808accd6017d 100644
--- a/unit_tests/operator/Test_MetaOperator.cpp
+++ b/unit_tests/operator/Test_MetaOperator.cpp
@@ -18,6 +18,7 @@
 
 #include "aidge/backend/cpu/operator/ConvImpl.hpp"
 #include "aidge/backend/cpu/operator/PadImpl.hpp"
+#include "aidge/backend/cpu/operator/TanhImpl.hpp"
 #include "aidge/data/Tensor.hpp"
 #include "aidge/filler/Filler.hpp"
 #include "aidge/operator/Conv.hpp"