diff --git a/README.md b/README.md
index 75bbbdd..20a3726 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,8 @@ use tinyid::TinyId;
 let mut id = TinyId::random();
 assert!(id.is_valid());
 assert!(!id.is_null());
-id.make_invalid();
+
+id.make_null();
 assert!(!id.is_valid());
 assert!(id.is_null());
 assert_eq!(id, TinyId::null());
diff --git a/src/lib.rs b/src/lib.rs
index f110ce8..159411b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -18,7 +18,7 @@
 //! let mut id = TinyId::random();
 //! assert!(id.is_valid());
 //! assert!(!id.is_null());
-//! id.make_invalid();
+//! id.make_null();
 //! assert!(!id.is_valid());
 //! assert!(id.is_null());
 //! assert_eq!(id, TinyId::null());
@@ -166,6 +166,11 @@ impl TinyId {
         self.data == Self::NULL_DATA
     }
 
+    /// Makes this [`TinyId`] null.
+    pub fn make_null(&mut self) {
+        self.data = Self::NULL_DATA;
+    }
+
     fn from_str(s: &str) -> std::result::Result<Self, TinyIdError> {
         use std::char::TryFromCharError;
         if s.len() != 8 {