diff --git a/fsl_course/feat3/feedsRun3.py b/fsl_course/feat3/feedsRun3.py
index a40cf875a867276082d33c1c6fa08dfd4509355b..1778b3e5e32a2ec346f4bbca079db9cca302a19e 100755
--- a/fsl_course/feat3/feedsRun3.py
+++ b/fsl_course/feat3/feedsRun3.py
@@ -36,7 +36,7 @@ cmd = "./cleanFSF.py {0} {1} {2} {3} {4} {5}".format(
     origFSF, newFSF, origDataDir, dataDir, outDir, origFSLDir)
 
 run(cmd)
-cmd = """sed -i 's/set feat_files(1).*/set feat_files(1) "{0}"/g' {1}""".format(newFeatDir,newFSF)
+cmd = """sed -ie 's/set feat_files(1).*/set feat_files(1) "{0}"/g' {1}""".format(newFeatDir,newFSF)
 print(cmd)
 run(cmd)