diff --git a/aegisub/docs/doxygen/pages_reporter/groups.dox b/aegisub/docs/doxygen/pages_reporter/groups.dox
index 119e102a1..13172d4be 100644
--- a/aegisub/docs/doxygen/pages_reporter/groups.dox
+++ b/aegisub/docs/doxygen/pages_reporter/groups.dox
@@ -1,6 +1,6 @@
 /**
 @defgroup base		Base
-@defgroup Unix		Unix
+@defgroup unix		Unix
 @defgroup windows	Windows
 @defgroup osx		OS X
 @defgroup io		File I/O