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diff --git a/tiger-compiler/src/overload/liboverload.hh b/tiger-compiler/src/overload/liboverload.hh
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+/**
+ ** \file overload/liboverload.hh
+ ** \brief Declare functions and variables exported by overload module.
+ */
+
+#pragma once
+
+#include <ast/fwd.hh>
+#include <misc/error.hh>
+#include <overload/binder.hh>
+
+/**
+ ** \brief Perform type checking, allowing function overloading.
+ */
+namespace overload
+{
+  /** \brief Bind identifier uses to their definition, allowing
+      function overloading, and return a list of potential definition
+      sites for each function call.
+
+      \param tree AST to bind.
+
+      \return a pair whose first element is the potential function
+              bindings, and the second element the error status.  */
+  std::pair<overfun_bindings_type, misc::error> bind(ast::Ast& tree);
+
+  /** \brief Check types allowing function overloading.
+
+      \param tree             abstract syntax tree's root.
+      \param overfun_bindings potential function bindings.
+
+      \return success of the type-checking.  */
+  misc::error types_check(ast::Ast& tree,
+                          const overfun_bindings_type& overfun_bindings);
+
+} // namespace overload