diff --git a/README.md b/README.md
index f0aecf989..ac45ee012 100644
--- a/README.md
+++ b/README.md
@@ -310,7 +310,6 @@ The author of the Silk icon set is Mark James.
         --scale             Factor for scaling input object (default: 1)
         --rotate            Rotation angle in degrees (0-360, default: 0)
         --duplicate         Number of items with auto-arrange (1+, default: 1)
-        --bed-size          Bed size, only used for auto-arrange (mm, default: 200,200)
         --duplicate-grid    Number of items with grid arrangement (default: 1,1)
         --duplicate-distance Distance in mm between copies (default: 6)
         --xy-size-compensation
diff --git a/slic3r.pl b/slic3r.pl
index f1a2fc1af..e5c19cc74 100755
--- a/slic3r.pl
+++ b/slic3r.pl
@@ -438,7 +438,6 @@ $j
     --scale             Factor for scaling input object (default: 1)
     --rotate            Rotation angle in degrees (0-360, default: 0)
     --duplicate         Number of items with auto-arrange (1+, default: 1)
-    --bed-size          Bed size, only used for auto-arrange (mm, default: $config->{bed_size}->[0],$config->{bed_size}->[1])
     --duplicate-grid    Number of items with grid arrangement (default: 1,1)
     --duplicate-distance Distance in mm between copies (default: $config->{duplicate_distance})
     --xy-size-compensation