diff --git a/src/extensions/collectible.rs b/src/extensions/collectible.rs
index b3171d1..575c5d1 100644
--- a/src/extensions/collectible.rs
+++ b/src/extensions/collectible.rs
@@ -1323,7 +1323,7 @@ where
   Collection: FromIterator<Item> + Sized,
 {
   let size = values.len();
-  let mut combination = Vec::from_iter(iter::once(-2).chain(0..(k as i64)));
+  let mut combination = Vec::from_iter(iter::once(i64::MIN).chain(0..(k as i64)));
   unfold((size + 1).saturating_sub(k), |current_slot| {
     if *current_slot == 0 {
       return None;
diff --git a/src/extensions/sequence.rs b/src/extensions/sequence.rs
index 8ad2330..8e9b3c5 100644
--- a/src/extensions/sequence.rs
+++ b/src/extensions/sequence.rs
@@ -1805,7 +1805,7 @@ where
 {
   let values = Vec::from_iter(iterator);
   let size = values.len();
-  let mut combination = Vec::from_iter(iter::once(-2).chain(iter::repeat(0).take(k - 1)));
+  let mut combination = Vec::from_iter(iter::once(i64::MIN).chain(iter::repeat(0).take(k - 1)));
   unfold((size + 1).saturating_sub(k), |current_slot| {
     if *current_slot == 0 {
       return None;
@@ -1860,7 +1860,7 @@ where
   }
   let values = Vec::from_iter(iterator);
   let size = values.len();
-  let mut combination = Vec::from_iter(iter::once(-2).chain(iter::repeat(0).take(k - 1)));
+  let mut combination = Vec::from_iter(iter::once(i64::MIN).chain(iter::repeat(0).take(k - 1)));
   unfold((size + 1).saturating_sub(k), |current_slot| {
     if *current_slot == 0 {
       return None;