diff --git a/CMakeLists.txt b/CMakeLists.txt
index b764086c8e974dc53aadd345cdd287918d599afb..fe353a650474cbe08b14aa1b8123e73e4dbd4eeb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -68,7 +68,7 @@ target_compile_features(${module_name} PRIVATE cxx_std_14)
 
 target_compile_options(${module_name} PRIVATE
     $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>,$<CXX_COMPILER_ID:GNU>>:
-    -Wall -Wextra -Wold-style-cast -Winline -pedantic -Werror=narrowing -Wshadow $<$<BOOL:${WERROR}>:-Werror>>)
+    -Wall -Wextra -Wold-style-cast -Winline -pedantic -Werror=narrowing -fvisibility=hidden -Wshadow $<$<BOOL:${WERROR}>:-Werror>>)
 target_compile_options(${module_name} PRIVATE
     $<$<CXX_COMPILER_ID:MSVC>:
     /W4>)
diff --git a/include/aidge/utils/DynamicAttributes.hpp b/include/aidge/utils/DynamicAttributes.hpp
index 37c4104b970b4fd8a64ad032b35a2f4b15eef78d..8ee294ce3a1bfa8bc95e0896794511b4c59822d4 100644
--- a/include/aidge/utils/DynamicAttributes.hpp
+++ b/include/aidge/utils/DynamicAttributes.hpp
@@ -183,6 +183,10 @@ private:
 
 #ifdef PYBIND
     // Stores C++ attributes (copy) and Python-only attributes
+    // Code should be compiled with -fvisibility=hidden
+    // See https://pybind11.readthedocs.io/en/stable/faq.html:
+    // “‘SomeClass’ declared with greater visibility than the type of its 
+    // field ‘SomeClass::member’ [-Wattributes]”
     std::map<std::string, py::object> mAttrsPy;
 #endif
 };