1 files changed, 1 insertions, 1 deletions
diff --git a/impl/IdSet.hpp b/impl/IdSet.hpp
index 6f6fd3f..8c64051 100644
--- a/impl/IdSet.hpp
+++ b/impl/IdSet.hpp
@@ -91,7 +91,7 @@ class IdSet {
 
   void absorb(const IdSet& other) {
     if (_length == other._length) {
-      for (unsigned int i = 0; i < _length; ++i) {
+      for (unsigned int i = 0; i < DIV_ROUND_UP(_length, CELL_SIZE); ++i) {
         _values[i] |= other._values[i];
       }
     } else {