diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index 280a66711..4ad984992 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -2468,7 +2468,7 @@ void PrintConfigDef::init_fff_params()
     def->gui_type = ConfigOptionDef::GUIType::i_enum_open;
     def->label    = L("Support");
     def->category = L("Support");
-    def->tooltip = L("Filament to print support and skirt. 0 means no specific filament for support and current filament is used");
+    def->tooltip = L("Filament to print support and raft. \"Default\" means no specific filament for support and current filament is used");
     def->min = 0;
     def->mode = comSimple;
     def->set_default_value(new ConfigOptionInt(1));
@@ -2493,7 +2493,7 @@ void PrintConfigDef::init_fff_params()
     def->gui_type = ConfigOptionDef::GUIType::i_enum_open;
     def->label    = L("Support interface");
     def->category = L("Support");
-    def->tooltip = L("Filament to print support interface. 0 means no specific filament for support interface and current filament is used");
+    def->tooltip = L("Filament to print support interface. \"Default\" means no specific filament for support interface and current filament is used");
     def->min = 0;
     // BBS
     def->mode = comSimple;