diff --git a/src/scportrait/tools/stitch/_stitch.py b/src/scportrait/tools/stitch/_stitch.py
index 483336d2..2323d45f 100644
--- a/src/scportrait/tools/stitch/_stitch.py
+++ b/src/scportrait/tools/stitch/_stitch.py
@@ -338,7 +338,7 @@ def generate_thumbnail(self, scale=0.05):
             rescale = True
         else:
             if not self.do_intensity_rescale:
-                rescale = False #turn off rescaling
+                rescale = False  # turn off rescaling
 
         # rescale generated thumbnail
         if rescale: