diff --git a/include/aidge/operator/FC.hpp b/include/aidge/operator/FC.hpp
index 39d2765c316445f28a1daf1687f3daefaad5a802..e513c3059fa3819ac81f26a373b92de9d3cba3fc 100644
--- a/include/aidge/operator/FC.hpp
+++ b/include/aidge/operator/FC.hpp
@@ -116,6 +116,7 @@ public:
 
     /**
      * @brief Forward the data type.
+     * The output is set to be the same type as the bias input.
      * @return True if successful, false otherwise.
      */
     bool forwardDType() override final;