diff --git a/atlas/gen/atlas-gen.spec b/atlas/gen/atlas-gen.spec
index 6ff816eb320c1e25f225a8f56a5da28586ba13c0..91eb2aa448045673f652080d96440a0ee8e3c224 100644
--- a/atlas/gen/atlas-gen.spec
+++ b/atlas/gen/atlas-gen.spec
@@ -1,5 +1,5 @@
 HEPWL_BMKEXE=atlas-gen-bmk.sh
-HEPWL_BMKOPTS="-e 4 -t 2" # -c replaces -n as of v0.11
+HEPWL_BMKOPTS="-e 4" # -c replaces -n as of v0.11
 HEPWL_BMKDIR=atlas-gen
 HEPWL_BMKDESCRIPTION="ATLAS Event Generation based on athena version 19.2.5.5"
 HEPWL_DOCKERIMAGENAME=atlas-gen-bmk