diff --git a/prism/etc/scripts/prism-auto b/prism/etc/scripts/prism-auto
index 8215597f..e64fbf40 100755
--- a/prism/etc/scripts/prism-auto
+++ b/prism/etc/scripts/prism-auto
@@ -192,7 +192,7 @@ def getMatchingAutoFilesInDir(dir, modelFile):
 # Get a list of all out files in a directory
 
 def getOutFilesInDir(dir):
-    return getFilesInDir(dir, isOutFile, false)
+    return getFilesInDir(dir, isOutFile)
 
 # Get a list of all out files in a directory whose prefix matches a model file name