diff --git a/ROSCO_toolbox/utilities.py b/ROSCO_toolbox/utilities.py
index 81eae8b6a..6c0c316d3 100644
--- a/ROSCO_toolbox/utilities.py
+++ b/ROSCO_toolbox/utilities.py
@@ -17,7 +17,10 @@
 from itertools import takewhile, product
 import struct
 
-from wisdem.aeroelasticse.Util import spectral
+try:
+    from wisdem.aeroelasticse.Util import spectral
+except:
+    pass
 
 # Some useful constants
 now = datetime.datetime.now()