diff --git a/PWGDQ/Tasks/qaMatching.cxx b/PWGDQ/Tasks/qaMatching.cxx
index 9b5cdef037c..9ba6c2dd1c0 100644
--- a/PWGDQ/Tasks/qaMatching.cxx
+++ b/PWGDQ/Tasks/qaMatching.cxx
@@ -1773,6 +1773,9 @@ struct qaMatching {
       collisionIds.push_back(collision.globalIndex());
     }
 
+    if (collisionIds.empty())
+      return;
+
     for (size_t cid = 1; cid < collisionIds.size() - 1; cid++) {
       const auto& collision = collisions.rawIteratorAt(collisionIds[cid]);
       int64_t collisionIndex = collision.globalIndex();