diff --git a/src/libslic3r/GCode/ToolOrdering.cpp b/src/libslic3r/GCode/ToolOrdering.cpp
index 0db9be7b9b..5971ee1005 100644
--- a/src/libslic3r/GCode/ToolOrdering.cpp
+++ b/src/libslic3r/GCode/ToolOrdering.cpp
@@ -193,11 +193,19 @@ std::vector<unsigned int> get_extruders_order(const std::vector<std::vector<floa
                                               bool use_forcast = false,
                                               float* cost = nullptr)
 {
-    if (curr_layer_extruders.size() <= 1) {
+    if (curr_layer_extruders.empty()) {
         if (cost)
             *cost = 0;
         return curr_layer_extruders;
     }
+    if (curr_layer_extruders.size() == 1) {
+        if (cost) {
+            *cost = 0;
+            if (start_extruder_id)
+                *cost = wipe_volumes[*start_extruder_id][curr_layer_extruders[0]];
+        }
+        return curr_layer_extruders;
+    }
 
     if (use_forcast)
         return solve_extruder_order_with_forcast(wipe_volumes, curr_layer_extruders, next_layer_extruders, start_extruder_id, cost);