diff --git a/src/extension/prelude.rs b/src/extension/prelude.rs
index 0db268400..07e88ddb8 100644
--- a/src/extension/prelude.rs
+++ b/src/extension/prelude.rs
@@ -133,6 +133,11 @@ impl ConstUsize {
     pub fn new(value: u64) -> Self {
         Self(value)
     }
+
+    /// Returns the value of the constant.
+    pub fn value(&self) -> u64 {
+        self.0
+    }
 }
 
 #[typetag::serde]