diff --git a/include/PrimeTower.h b/include/PrimeTower.h
index 5bb8192a82..82c443f72d 100644
--- a/include/PrimeTower.h
+++ b/include/PrimeTower.h
@@ -101,7 +101,7 @@ class PrimeTower
     void subtractFromSupport(SliceDataStorage& storage);
 
 private:
-    ExtrusionMoves generatePaths_extraBrim(const Polygons &outer_poly, coord_t extra_radius, coord_t line_width, bool add_inset);
+    ExtrusionMoves generatePaths_extraBrim(const Polygons& outer_poly, coord_t extra_radius, coord_t line_width, bool add_inset);
 
     /*!
      * \see WipeTower::generatePaths