diff --git a/Py6S/SixSHelpers/all_angles.py b/Py6S/SixSHelpers/all_angles.py
index 5089567..7f92003 100644
--- a/Py6S/SixSHelpers/all_angles.py
+++ b/Py6S/SixSHelpers/all_angles.py
@@ -18,7 +18,7 @@
 import copy
 import itertools
 from multiprocessing.dummy import Pool
-
+from matplotlib.pyplot import subplots
 import numpy as np
 
 from ..sixs_exceptions import ParameterError