diff --git a/RecoTracker/DeDx/plugins/HLTDeDxFilter.h b/RecoTracker/DeDx/plugins/HLTDeDxFilter.h
index 7bb27e02309f7..ae70848e4cb7c 100644
--- a/RecoTracker/DeDx/plugins/HLTDeDxFilter.h
+++ b/RecoTracker/DeDx/plugins/HLTDeDxFilter.h
@@ -37,6 +37,7 @@ class HLTDeDxFilter : public HLTFilter {
       double maxNHitMissIn_;
       double maxNHitMissMid_;
       double maxRelTrkIsoDeltaRp3_;
+      double relTrkIsoDeltaRSize_;
       edm::EDGetToken inputTracksToken_;
       edm::EDGetToken inputdedxToken_;
       edm::InputTag inputTracksTag_;