diff --git a/examples/UniformDMBox/makeIC.py b/examples/UniformDMBox/makeIC.py
index 3ca944f3216640095ff118baae8d8f612d3d3ab1..061b4d0ad1959d9e25356aff80e78adb9c1c4faa 100644
--- a/examples/UniformDMBox/makeIC.py
+++ b/examples/UniformDMBox/makeIC.py
@@ -72,7 +72,7 @@ m = zeros(1)
 
 ids = linspace(0, numPart, numPart, endpoint=False).reshape((numPart,1))
 ds = grp.create_dataset('ParticleIDs', (numPart, 1), 'L')
-ds[()] = ids
+ds[()] = ids + 1
 x      = ids % L;
 y      = ((ids - x) / L) % L;
 z      = (ids - x - L * y) / L**2;