diff --git a/soitool/soi.py b/soitool/soi.py
index 7c478fce3ea370bbf5093eda0352074750689679..ddae937980e4436c887db5f1288ca6fa26134d67 100644
--- a/soitool/soi.py
+++ b/soitool/soi.py
@@ -313,7 +313,7 @@ class SOI:
         self.modules = modules
         self.attachments = attachments
 
-        # the following properties are relevant when self.placement_strategy
+        # The following properties are relevant when self.placement_strategy
         # is "auto". They are used by rectpack
         self.algorithm_bin = algorithm_bin
         self.algorithm_pack = algorithm_pack