diff --git a/TrackingTools/MeasurementDet/interface/MeasurementDet.h b/TrackingTools/MeasurementDet/interface/MeasurementDet.h
index d1629c26b8a11..181ef2512efe8 100644
--- a/TrackingTools/MeasurementDet/interface/MeasurementDet.h
+++ b/TrackingTools/MeasurementDet/interface/MeasurementDet.h
@@ -62,12 +62,13 @@ class MeasurementDet {
     measurements(stateOnThisDet, est, data, tmps);
     std::vector<TrajectoryMeasurement> result;
     result.reserve(tmps.size());
-    int index[tmps.size()];
+    int* index = new int[tmps.size()];
     tmps.sortIndex(index);
     for (std::size_t i = 0; i != tmps.size(); ++i) {
       auto j = index[i];
       result.emplace_back(stateOnThisDet, std::move(tmps.hits[j]), tmps.distances[j]);
     }
+    delete[] index;
     return result;
   }