diff --git a/signalgen.py b/signalgen.py
index 4845eab..60b370f 100755
--- a/signalgen.py
+++ b/signalgen.py
@@ -125,8 +125,12 @@ def addBurst(values):
 	#and save the new plot
 	show_dynamic(injectedSpectra, f"{basename} Dynamic Spectra and {values.dm} DM Pulse", save=True)
 	#now generate new filterbank file
-
-	sigprocObj = make_sigproc_object(**(filterbankObj.your_header.__dict__))
+	#build header from original file
+	headerDic = filterbankObj.your_header.__dict__
+	#remove extraneous keys
+	for key in ['filelist']:
+		headerDic.pop(key, None)
+	sigprocObj = make_sigproc_object(**headerDic)
 	newName = f"{basename}_injected.fil"
 	sigprocObj.write_header(newName)
 	sigprocObj.append_spectra(injectedSpectra, newName)