diff --git a/docs/source/techniques/ISISPowder-Polaris-v1.rst b/docs/source/techniques/ISISPowder-Polaris-v1.rst
index b31126f55a515e7b256b57b36db6ef9f0ba954b3..27870d88452e8f3f8ecf41361d545268e946fe52 100644
--- a/docs/source/techniques/ISISPowder-Polaris-v1.rst
+++ b/docs/source/techniques/ISISPowder-Polaris-v1.rst
@@ -738,7 +738,7 @@ On POLARIS this is set to the following:
 
 .. code-block:: python
 		
-  cylinder_sample_radius = 0.4
+  cylinder_sample_radius = 0.25
 
 cylinder_position
 =================
diff --git a/scripts/Diffraction/isis_powder/polaris_routines/polaris_advanced_config.py b/scripts/Diffraction/isis_powder/polaris_routines/polaris_advanced_config.py
index b5dd0a4517c2c8c71a76cec0a751818034daa9b6..c447db233c11762d4ad7a6616c3e9496dd8cdedd 100644
--- a/scripts/Diffraction/isis_powder/polaris_routines/polaris_advanced_config.py
+++ b/scripts/Diffraction/isis_powder/polaris_routines/polaris_advanced_config.py
@@ -6,7 +6,7 @@ absorption_correction_params = {
     # These are read directly by the generate absorb corrections functions instead of being parsed.
     # Therefore they cannot be overridden using basic config files or keyword arguments.
     "cylinder_sample_height": 4.0,
-    "cylinder_sample_radius": 0.4,
+    "cylinder_sample_radius": 0.25,
     "cylinder_position": [0., 0., 0.],
 
     "chemical_formula": "V",