diff --git a/Lib/fontTools/qu2cu/qu2cu.py b/Lib/fontTools/qu2cu/qu2cu.py
index ccd0b248f..4f12adfc9 100644
--- a/Lib/fontTools/qu2cu/qu2cu.py
+++ b/Lib/fontTools/qu2cu/qu2cu.py
@@ -253,7 +253,7 @@ def spline_to_curves(q, costs, tolerance=0.5, all_cubic=False):
     # cubic curves, and within those the one with smallest error.
     sols = [Solution(0, 0, 0, False)]
     for i in range(1, len(elevated_quadratics) + 1):
-        best_sol = Solution(len(q) * 4 + 1, 0, 1, False) # Impossible
+        best_sol = Solution(len(q) * 4 + 1, 0, 1, False)  # Impossible
         for j in range(0, i):
 
             j_sol_count, j_sol_error = sols[j].num_points, sols[j].error