diff --git a/ReactCommon/jsi/jsi/jsi.h b/ReactCommon/jsi/jsi/jsi.h
index 2309cdaf319..94120db2781 100644
--- a/ReactCommon/jsi/jsi/jsi.h
+++ b/ReactCommon/jsi/jsi/jsi.h
@@ -811,18 +811,30 @@ class Function : public Object {
       unsigned int paramCount,
       jsi::HostFunctionType func);
 
-  /// Calls the function with \c count \c args.  The \c this value of
-  /// the JS function will be undefined.
+  /// Calls the function with \c count \c args.  The \c this value of the JS
+  /// function will not be set by the C++ caller, similar to calling
+  /// Function.prototype.apply(undefined, args) in JS.
+  /// \b Note: as with Function.prototype.apply, \c this may not always be
+  /// \c undefined in the function itself.  If the function is non-strict,
+  /// \c this will be set to the global object.
   Value call(Runtime& runtime, const Value* args, size_t count) const;
 
   /// Calls the function with a \c std::initializer_list of Value
-  /// arguments. The \c this value of the JS function will be
-  /// undefined.
+  /// arguments.  The \c this value of the JS function will not be set by the
+  /// C++ caller, similar to calling Function.prototype.apply(undefined, args)
+  /// in JS.
+  /// \b Note: as with Function.prototype.apply, \c this may not always be
+  /// \c undefined in the function itself.  If the function is non-strict,
+  /// \c this will be set to the global object.
   Value call(Runtime& runtime, std::initializer_list<Value> args) const;
 
   /// Calls the function with any number of arguments similarly to
-  /// Object::setProperty().  The \c this value of the JS function
-  /// will be undefined.
+  /// Object::setProperty().  The \c this value of the JS function will not be
+  /// set by the C++ caller, similar to calling
+  /// Function.prototype.call(undefined, ...args) in JS.
+  /// \b Note: as with Function.prototype.call, \c this may not always be
+  /// \c undefined in the function itself.  If the function is non-strict,
+  /// \c this will be set to the global object.
   template <typename... Args>
   Value call(Runtime& runtime, Args&&... args) const;