diff --git a/src/slic3r/GUI/AmsMappingPopup.cpp b/src/slic3r/GUI/AmsMappingPopup.cpp
index f76f50ad4..8299705ed 100644
--- a/src/slic3r/GUI/AmsMappingPopup.cpp
+++ b/src/slic3r/GUI/AmsMappingPopup.cpp
@@ -1190,7 +1190,7 @@ void AmsReplaceMaterialDialog::create()
     auto label_title = new Label(this, _L("Auto refill"));
     label_title->SetFont(Label::Head_14);
     label_title->SetForegroundColour(0x00AE42);
-    auto label_txt = new Label(this, _L("When the current material run out,the printer will continue to print in the following order."));
+    auto label_txt = new Label(this, _L("When the current material run out, the printer will continue to print in the following order."));
     label_txt->SetFont(Label::Body_13);
     label_txt->SetForegroundColour(StateColor::darkModeColorFor(wxColour("#323A3C")));
     label_txt->SetMinSize(wxSize(FromDIP(380), -1));