diff --git a/lib/Slic3r/GUI/Plater.pm b/lib/Slic3r/GUI/Plater.pm
index 86d070cd0e..0b7d0ec3ad 100644
--- a/lib/Slic3r/GUI/Plater.pm
+++ b/lib/Slic3r/GUI/Plater.pm
@@ -804,7 +804,7 @@ sub split_object {
     
     my @model_objects = @{$current_model_object->split_object};
     if (@model_objects == 1) {
-        Slic3r::GUI::warning_catcher($self)->("The selected object couldn't be split because it already contains a single part.");
+        Slic3r::GUI::warning_catcher($self)->("The selected object couldn't be split because it contains only one part.");
         return;
     }