diff --git a/cura/ExtrudersModel.py b/cura/ExtrudersModel.py
index a915a21506..a95f9f8a99 100644
--- a/cura/ExtrudersModel.py
+++ b/cura/ExtrudersModel.py
@@ -51,7 +51,7 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
         global_container_stack = UM.Application.getInstance().getGlobalContainerStack()
         if not global_container_stack:
             return #There is no machine to get the extruders of.
-        for index, extruder in manager.getMachineExtruders(global_container_stack.getBottom()):
+        for index, extruder in enumerate(manager.getMachineExtruders(global_container_stack.getBottom())):
             material = extruder.findContainer(type = "material")
             colour = material.getMetaDataEntry("color_code", default = "#FFFF00") if material else "#FFFF00"
             item = { #Construct an item with only the relevant information.