diff --git a/pruning/src/lib.rs b/pruning/src/lib.rs
index cd31598..e49aedb 100644
--- a/pruning/src/lib.rs
+++ b/pruning/src/lib.rs
@@ -327,7 +327,7 @@ impl DecompressedPruningSeed {
     ///
     /// This function will also error if `block_height` > `blockchain_height`
     ///
-    pub fn get_next_unpruned_block(
+    pub const fn get_next_unpruned_block(
         &self,
         block_height: usize,
         blockchain_height: usize,