diff --git a/src/xfel_calibrate/calibrate.py b/src/xfel_calibrate/calibrate.py
index 222ebfdcc6bdd733738334603b27fa8d3cb705b6..5d9fd28cf4a572004cdf31d106a5e423009822c4 100755
--- a/src/xfel_calibrate/calibrate.py
+++ b/src/xfel_calibrate/calibrate.py
@@ -507,7 +507,7 @@ def make_par_table(parms):
 
         Examples:
             >>> split_len("slurm_prof_230711_095647.832671_0", 10)
-            'slurm\_prof\_230711\\-\_095647.832671\_0\-'
+            ''slurm_prof_230711_09\\-5647.832671_0\\-''
         """
         lbc = set(' ,-/')
         line = ''