diff --git a/examples/KelvinHelmholtz_2D/makeIC.py b/examples/KelvinHelmholtz_2D/makeIC.py
index bd0f39ed90faf0d67ff4a508bff83067bf748d43..744b39de8260720521ae8e77ed5d0a12161f2b6a 100644
--- a/examples/KelvinHelmholtz_2D/makeIC.py
+++ b/examples/KelvinHelmholtz_2D/makeIC.py
@@ -24,7 +24,7 @@ import sys
 # Generates a swift IC file for the Kelvin-Helmholtz vortex in a periodic box
 
 # Parameters
-L2    = 128       # Particles along one edge in the low-density region
+L2    = 256       # Particles along one edge in the low-density region
 gamma = 5./3.     # Gas adiabatic index
 P1    = 2.5       # Central region pressure
 P2    = 2.5       # Outskirts pressure