diff --git a/plugins/CuraEngineBackend/StartSliceJob.py b/plugins/CuraEngineBackend/StartSliceJob.py
index 28e442033b..dd0d9db0a2 100644
--- a/plugins/CuraEngineBackend/StartSliceJob.py
+++ b/plugins/CuraEngineBackend/StartSliceJob.py
@@ -440,8 +440,7 @@ class StartSliceJob(Job):
             Job.yieldThread()
 
         # Ensure that the engine is aware what the build extruder is.
-        if stack.getProperty("machine_extruder_count", "value") > 1:
-            changed_setting_keys.add("extruder_nr")
+        changed_setting_keys.add("extruder_nr")
 
         # Get values for all changed settings
         for key in changed_setting_keys: