diff --git a/include/remollGlobalField.hh b/include/remollGlobalField.hh
index 2a4edf680..dea0100b6 100644
--- a/include/remollGlobalField.hh
+++ b/include/remollGlobalField.hh
@@ -27,6 +27,7 @@ class remollGlobalField : public G4MagneticField {
 
         void AddNewField(G4String& name);
 
+        void SetZOffset(const G4String& name, G4double offset);
         void SetFieldScale(const G4String& name, G4double scale);
         void SetMagnetCurrent(const G4String& name, G4double current);
 
diff --git a/macros/runexample.mac b/macros/runexample.mac
index 2ef760633..2c19ef7e7 100644
--- a/macros/runexample.mac
+++ b/macros/runexample.mac
@@ -21,6 +21,9 @@
 /remoll/addfield map_directory/blockyHybrid_rm_3.0.txt
 /remoll/addfield map_directory/blockyUpstream_rm_1.1.txt
 
+/remoll/field/zoffset map_directory/blockyHybrid_rm_3.0.txt -5087.
+/remoll/field/zoffset map_directory/blockyUpstream_rm_1.1.txt -5087.
+
 #/remoll/field/scale map_directory/blockyHybrid_rm_3.0.txt 1.0
 #/remoll/field/current map_directory/blockyHybrid_rm_3.0.txt 1000.0
 
diff --git a/src/remollGlobalField.cc b/src/remollGlobalField.cc
index 3966d334f..79ff876f0 100644
--- a/src/remollGlobalField.cc
+++ b/src/remollGlobalField.cc
@@ -78,6 +78,7 @@ remollGlobalField::remollGlobalField()
     fGlobalFieldMessenger->DeclareProperty("deltachord",fDeltaChord,"Set delta chord for the chord finder");
     fGlobalFieldMessenger->DeclareProperty("deltaonestep",fDeltaOneStep,"Set delta one step for the field manager");
     fGlobalFieldMessenger->DeclareProperty("deltaintersection",fMinStep,"Set delta intersection for the field manager");
+    fGlobalFieldMessenger->DeclareMethod("zoffset",&remollGlobalField::SetZOffset,"Set magnetic field z offset");
     fGlobalFieldMessenger->DeclareMethod("scale",&remollGlobalField::SetFieldScale,"Scale magnetic field by factor");
     fGlobalFieldMessenger->DeclareMethod("current",&remollGlobalField::SetMagnetCurrent,"Scale magnetic field by current");
     fGlobalFieldMessenger->DeclareMethod("value",&remollGlobalField::PrintFieldValue,"Print the field value at a given point (in m)");
@@ -271,7 +272,16 @@ void remollGlobalField::GetFieldValue(const G4double p[], G4double *resB) const
     }
 }
 
+void remollGlobalField::SetZOffset(const G4String& name, G4double offset)
 {
+  remollMagneticField *field = GetFieldByName(name);
+  if (field) {
+    G4AutoLock lock(&remollGlobalFieldMutex);
+    field->SetZoffset(offset);
+  } else {
+    G4cerr << "WARNING " << __FILE__ << " line " << __LINE__
+           << ": field " << name << " offset failed" << G4endl;
+  }
 }
 
 void remollGlobalField::SetFieldScale(const G4String& name, G4double scale)