diff --git a/src/miniscript/context.rs b/src/miniscript/context.rs
index 6e236e154..2ace85b5a 100644
--- a/src/miniscript/context.rs
+++ b/src/miniscript/context.rs
@@ -739,9 +739,9 @@ impl ScriptContext for BareCtx {
 
     fn pk_len<Pk: MiniscriptKey>(pk: &Pk) -> usize {
         if pk.is_uncompressed() {
-            65
+            66
         } else {
-            33
+            34
         }
     }