diff --git a/pypeit/par/pypeitpar.py b/pypeit/par/pypeitpar.py
index ac05766e4b..5e5a6212e0 100644
--- a/pypeit/par/pypeitpar.py
+++ b/pypeit/par/pypeitpar.py
@@ -3227,7 +3227,7 @@ def __init__(self, filt_iter=None, sobel_mode=None, edge_thresh=None, sobel_enha
         dtypes['trim_spec'] = list
         descr['trim_spec'] = 'User-defined truncation of all slits in the spectral direction.' \
                              'Should be two integers, e.g. 100,150 trims 100 pixels from the ' \
-                             'short wavelength end and 150 pixels from the long wavelength '
+                             'short wavelength end and 150 pixels from the long wavelength ' \
                              'end of the spectral axis of the detector.'
         
         defaults['max_shift_abs'] = 0.5