diff --git a/analysis/PWGDIL/dielectron/lmvm/CbmAnaDielectronTaskDrawAll.cxx b/analysis/PWGDIL/dielectron/lmvm/CbmAnaDielectronTaskDrawAll.cxx
index 3b57bfeea17365a9f7549d957a6d71c47d785e10..21b2d45e70a30a5c42d8467b53e434ee087be202 100644
--- a/analysis/PWGDIL/dielectron/lmvm/CbmAnaDielectronTaskDrawAll.cxx
+++ b/analysis/PWGDIL/dielectron/lmvm/CbmAnaDielectronTaskDrawAll.cxx
@@ -1686,7 +1686,7 @@ void CbmAnaDielectronTaskDrawAll::CalcCombBGHistos()
 
 
     // from 'Cocktail + BG'
-    TH1D* cock;
+    TH1D* cock = NULL;
     if (step == kMc) cock = (TH1D*) GetCoctailMinv(kMc);
     else if (step == kAcc)
       cock = (TH1D*) GetCoctailMinv(kAcc);