diff --git a/stepmania/Docs/LuaDocumentation.xml b/stepmania/Docs/LuaDocumentation.xml
index 53425d82ed..c153031575 100644
--- a/stepmania/Docs/LuaDocumentation.xml
+++ b/stepmania/Docs/LuaDocumentation.xml
@@ -780,7 +780,7 @@
 	<Function name='GetPlayMode' return='PlayMode' arguments=''>
 		Returns the Course's <Link class='ENUM' function='PlayMode' />.
 	</Function>
-	<Function name='GetTotalSeconds' return='float' arguments=''>
+	<Function name='GetTotalSeconds' return='float' arguments='StepsType st'>
 		Returns the total length of the Course in seconds.
 	</Function>
 	<Function name='GetTranslitFullTitle' return='string' arguments=''>