diff --git a/nlohmann::basic_json::is_null.md b/nlohmann::basic_json::is_null.md
index d91767f..98d4b42 100644
--- a/nlohmann::basic_json::is_null.md
+++ b/nlohmann::basic_json::is_null.md
@@ -38,11 +38,11 @@ int main()
     nlohmann::json j_string = "Hello, world";
 
     std::cout << std::boolalpha << j_null.is_null() << '\n';
-    std::cout << std::boolalpha << j_boolean.is_boolean() << '\n';
-    std::cout << std::boolalpha << j_number.is_number() << '\n';
-    std::cout << std::boolalpha << j_object.is_object() << '\n';
-    std::cout << std::boolalpha << j_array.is_array() << '\n';
-    std::cout << std::boolalpha << j_string.is_string() << '\n';
+    std::cout << std::boolalpha << j_boolean.is_null() << '\n';
+    std::cout << std::boolalpha << j_number.is_null() << '\n';
+    std::cout << std::boolalpha << j_object.is_null() << '\n';
+    std::cout << std::boolalpha << j_array.is_null() << '\n';
+    std::cout << std::boolalpha << j_string.is_null() << '\n';
 }
 ```
 
@@ -50,11 +50,11 @@ int main()
 
 ```
 true
-true
-true
-true
-true
-true
+false
+false
+false
+false
+false
 ```
 
 ## See also