diff --git a/src/plugins/projectexplorer/session.cpp b/src/plugins/projectexplorer/session.cpp
index b386a459342..df607009578 100644
--- a/src/plugins/projectexplorer/session.cpp
+++ b/src/plugins/projectexplorer/session.cpp
@@ -1135,11 +1135,17 @@ bool SessionManager::loadSession(const QString &session, bool initial)
     return true;
 }
 
+/*!
+    Returns the last session that was opened by the user.
+*/
 QString SessionManager::lastSession()
 {
     return ICore::settings()->value(Constants::LASTSESSION_KEY).toString();
 }
 
+/*!
+    Returns the session that was active when Qt Creator was last closed, if any.
+*/
 QString SessionManager::startupSession()
 {
     return ICore::settings()->value(Constants::STARTUPSESSION_KEY).toString();