diff --git a/benchmarks/extrude/duct_boundary_layer.geo b/benchmarks/extrude/duct_boundary_layer.geo
index fbde4188177f77bfd53f3a87a9b9a858c6e64811..b3ba2af7f18682e79cd58709bfe39baeeb232d60 100644
--- a/benchmarks/extrude/duct_boundary_layer.geo
+++ b/benchmarks/extrude/duct_boundary_layer.geo
@@ -1,4 +1,4 @@
-lc = 0.3;
+lc = 0.2;
 Point(1) = {0.0,0.0,0.0,lc};
 Point(2) = {1,0.0,0.0,lc};
 Point(3) = {1,1,0.0,lc};