diff --git a/src/geant4/app/src/ExN01UserScoreWriter.cc b/src/geant4/app/src/ExN01UserScoreWriter.cc
index 27a06eca7b..b18f0ec94c 100644
--- a/src/geant4/app/src/ExN01UserScoreWriter.cc
+++ b/src/geant4/app/src/ExN01UserScoreWriter.cc
@@ -32,7 +32,7 @@ void ExN01UserScoreWriter::DumpAllQuantitiesToFile(const G4String& fileName,
 
 // retrieve the map
 #ifdef GEANT4_GT_10_6
-using MeshScoreMap = G4VScoringMesh::MeshScoreMap;
+  using MeshScoreMap = G4VScoringMesh::MeshScoreMap;
 #endif
 
   MeshScoreMap scMap = fScoringMesh->GetScoreMap();