diff --git a/ParallelSearch.hpp b/ParallelSearch.hpp
index f13939b..9e73edb 100644
--- a/ParallelSearch.hpp
+++ b/ParallelSearch.hpp
@@ -27,7 +27,7 @@ public:
             // compute [first; last( iterators for sub-range
             std::size_t size = bucketSize + remains;
             Iterator first = begin + offset;
-            Iterator last = first + size;
+            Iterator last = begin + offset + size;
 
             // add appropriate search job
             jobList_.push_back(SearchJob<Iterator>(first, last, pattern));