diff --git a/README.markdown b/README.markdown
index cd41d1ad8..9cfc06161 100644
--- a/README.markdown
+++ b/README.markdown
@@ -102,6 +102,7 @@ The author is Alessandro Ranellucci (me).
                             (+/-, default: 0)
         --gcode-flavor      The type of G-code to generate (reprap/teacup/makerbot/mach3/no-extrusion,
                             default: reprap)
+        --use-relative-e-distances Enable this to get relative E values
         --gcode-arcs        Use G2/G3 commands for native arcs (experimental, not supported
                             by all firmwares)
         --g0                Use G0 commands for retraction (experimental, not supported by all
diff --git a/slic3r.pl b/slic3r.pl
index 25cbb0158..0dd0a3917 100755
--- a/slic3r.pl
+++ b/slic3r.pl
@@ -120,6 +120,7 @@ Usage: slic3r.pl [ OPTIONS ] file.stl
                         (+/-, default: $Slic3r::z_offset)
     --gcode-flavor      The type of G-code to generate (reprap/teacup/makerbot/mach3/no-extrusion,
                         default: $Slic3r::gcode_flavor)
+    --use-relative-e-distances Enable this to get relative E values
     --gcode-arcs        Use G2/G3 commands for native arcs (experimental, not supported
                         by all firmwares)
     --g0                Use G0 commands for retraction (experimental, not supported by all