diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index d1a8b30481..b17be8a76c 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -7352,7 +7352,7 @@ void Tab::switch_excluder(int extruder_id)
         {}, {"", "filament_extruder_variant"},                   // Preset::TYPE_FILAMENT filament don't use id anymore
         {}, {"printer_extruder_id", "printer_extruder_variant"}, // Preset::TYPE_PRINTER
     };
-    if (!m_variant_combo && (extruder_id >= nozzle_volumes->size() || extruder_id >= extruders->size()))
+    if (!m_variant_combo && (extruder_id >= (int)nozzle_volumes->size() || extruder_id >= (int)extruders->size()))
         extruder_id = 0;
     if (m_extruder_switch && m_type != Preset::TYPE_PRINTER) {
         int current_extruder = m_extruder_switch->GetValue() ? 1 : 0;