diff --git a/pipeline/prepareGadgetCatalog.py b/pipeline/prepareGadgetCatalog.py
index 0d4ac57..51f67cc 100755
--- a/pipeline/prepareGadgetCatalog.py
+++ b/pipeline/prepareGadgetCatalog.py
@@ -28,6 +28,7 @@ dataType = "simulation"
 
 # available formats for simulation: gadget, multidark
 dataFormat = "gadget"
+dataUnit = 1 # as multiple of Mpc/h
 
 # place particles on the lightcone?
 useLightCone = False 
@@ -131,6 +132,7 @@ logDir = "{logDir}/{setName}/"
   sampleInfo = """
 newSample = Sample(dataFile = "{dataFile}",
                    dataFormat = "{dataFormat}",
+                   dataUnit = {dataUnit},
                    fullName = "{sampleName}",
                    nickName = "{sampleName}",
                    dataType = "simulation",
@@ -197,6 +199,7 @@ dataSampleList.append(newSample)
 
           scriptFile.write(sampleInfo.format(dataFile=dataFileName, 
                                          dataFormat=dataFormat,
+                                         dataUnit=dataUnit,
                                          sampleName=sampleName,
                                          zMin=sliceMin,
                                          zMax=sliceMax,
diff --git a/python_tools/void_python_tools/backend/launchers.py b/python_tools/void_python_tools/backend/launchers.py
index 6a094c8..52beefb 100755
--- a/python_tools/void_python_tools/backend/launchers.py
+++ b/python_tools/void_python_tools/backend/launchers.py
@@ -110,7 +110,6 @@ def launchGenerate(sample, binPath, workDir=None, inputDataDir=None,
       dataFileLine = "multidark " + datafile
     elif sample.dataFormat == "gadget":
       dataFileLine = "gadget " + datafile
-      useGadgetUnit = "gadgetUnit=1"
       
     iX = float(sample.mySubvolume[0])
     iY = float(sample.mySubvolume[1])
@@ -126,7 +125,7 @@ def launchGenerate(sample, binPath, workDir=None, inputDataDir=None,
       outputParameter %s
       %s
       %s
-      %s
+      gadgetUnit %g
       rangeX_min %g
       rangeX_max %g
       rangeY_min %g
@@ -138,7 +137,7 @@ def launchGenerate(sample, binPath, workDir=None, inputDataDir=None,
              zobovDir+"/zobov_slice_"+sampleName+".par",
              includePecVelString,
              useLightConeString,
-             useGadgetUnit,
+             sample.gadgetUnit,
              xMin, xMax, yMin, yMax,
              sample.zBoundaryMpc[0], sample.zBoundaryMpc[1],
              sample.subsample)