diff --git a/DSSC.py b/DSSC.py
index bda05bda50cf79dfbc1129717c841f24a204dfbe..6aa51fd5aef0041f0186b79ee80f2e1e6377f895 100644
--- a/DSSC.py
+++ b/DSSC.py
@@ -345,7 +345,7 @@ class DSSC:
                 overwrite: boolean whether or not to overwrite existing files.
         """
         if save_folder is None:
-            save_folder = this.save_folder
+            save_folder = self.save_folder
 
         if self.isDark:
             fname = f'run{self.run_nr}_dark.h5'  # no scan