diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index 132c5682d1..2a25e765e8 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -4030,6 +4030,7 @@ void PrintConfigDef::init_sla_params()
     def->full_label = L("Printer absolute correction");
     def->tooltip  = L("Will inflate or deflate the sliced 2D polygons according "
                       "to the sign of the correction.");
+    def->sidetext = L("mm");
     def->mode = comExpert;
     def->set_default_value(new ConfigOptionFloat(0.0));