diff --git a/ROSCO_toolbox/ofTools/fast_io/output_processing.py b/ROSCO_toolbox/ofTools/fast_io/output_processing.py
index f6c5dc7f9..25c051ece 100644
--- a/ROSCO_toolbox/ofTools/fast_io/output_processing.py
+++ b/ROSCO_toolbox/ofTools/fast_io/output_processing.py
@@ -16,7 +16,7 @@
 from itertools import takewhile
 import struct
 
-from ofTools.util import spectral
+from ROSCO_toolbox.ofTools.util import spectral
 
 class output_processing():
     '''