diff --git a/Cargo.toml b/Cargo.toml
index b335170..08742ee 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pamsm"
-version = "0.4.1"
+version = "0.4.2"
 description = "Rust wrappers around PAM Service Modules functions"
 authors = ["Raphael Catolino <raphael.catolino@gmail.com>"]
 license = "GPL-3.0"
diff --git a/src/libpam.rs b/src/libpam.rs
index 3c653ac..af993d0 100644
--- a/src/libpam.rs
+++ b/src/libpam.rs
@@ -61,6 +61,9 @@ pub trait PamLibExt: private::Sealed {
     /// Get the cached authentication token.
     fn get_cached_authtok(&self) -> PamResult<Option<&CStr>>;
 
+    /// Get the cached old authentication token.
+    fn get_cached_oldauthtok(&self) -> PamResult<Option<&CStr>>;
+
     /// Get the cached authentication token or prompt the user for one if there isn't any.
     /// Returns PamError::SERVICE_ERR if the prompt contains any null byte
     fn get_authtok(&self, prompt: Option<&str>) -> PamResult<Option<&CStr>>;
@@ -125,6 +128,10 @@ impl PamLibExt for Pam {
         self.get_cstr_item(PamItemType::AUTHTOK)
     }
 
+    fn get_cached_oldauthtok(&self) -> PamResult<Option<&CStr>> {
+        self.get_cstr_item(PamItemType::OLDAUTHTOK)
+    }
+
     fn get_authtok(&self, prompt: Option<&str>) -> PamResult<Option<&CStr>> {
         let cprompt = match prompt {
             None => None,