diff --git a/plugins/CuraEngineBackend/ProcessSlicedLayersJob.py b/plugins/CuraEngineBackend/ProcessSlicedLayersJob.py
index d3053f9175..77a42f6b3e 100644
--- a/plugins/CuraEngineBackend/ProcessSlicedLayersJob.py
+++ b/plugins/CuraEngineBackend/ProcessSlicedLayersJob.py
@@ -96,7 +96,7 @@ class ProcessSlicedLayersJob(Job):
                 Job.yieldThread()
             Job.yieldThread()
             current_layer += 1
-            progress = (current_layer / layer_count) * 100
+            progress = (current_layer / layer_count) * 99
             # TODO: Rebuild the layer data mesh once the layer has been processed.
             # This needs some work in LayerData so we can add the new layers instead of recreating the entire mesh.