diff --git a/src/library/blast/hypothesis.h b/src/library/blast/hypothesis.h
index b33af5727c..5f3485cfc6 100644
--- a/src/library/blast/hypothesis.h
+++ b/src/library/blast/hypothesis.h
@@ -75,7 +75,7 @@ public:
 
     void erase(hypothesis_idx h) {
         m_set.erase(h);
-        m_buffer.erase(h);
+        m_buffer.erase_elem(h);
     }
 
     unsigned size() const { return m_buffer.size(); }