diff --git a/src/concurrent/qtconcurrentfilter.cpp b/src/concurrent/qtconcurrentfilter.cpp
index 0f8b6ae4f84..35141d2d7e9 100644
--- a/src/concurrent/qtconcurrentfilter.cpp
+++ b/src/concurrent/qtconcurrentfilter.cpp
@@ -4,6 +4,7 @@
 /*!
     \page qtconcurrentfilter.html
     \title Concurrent Filter and Filter-Reduce
+    \brief Selecting values from a sequence and combining them, all in parallel.
     \ingroup thread
 
     The QtConcurrent::filter(), QtConcurrent::filtered() and
diff --git a/src/concurrent/qtconcurrentmap.cpp b/src/concurrent/qtconcurrentmap.cpp
index ea805b44df7..222c8cd6396 100644
--- a/src/concurrent/qtconcurrentmap.cpp
+++ b/src/concurrent/qtconcurrentmap.cpp
@@ -108,6 +108,7 @@
 /*!
     \page qtconcurrentmap.html
     \title Concurrent Map and Map-Reduce
+    \brief Transforming values from a sequence and combining them, all in parallel.
     \ingroup thread
 
     The QtConcurrent::map(), QtConcurrent::mapped() and
diff --git a/src/concurrent/qtconcurrentrun.cpp b/src/concurrent/qtconcurrentrun.cpp
index b0872b0c015..fc19b947e59 100644
--- a/src/concurrent/qtconcurrentrun.cpp
+++ b/src/concurrent/qtconcurrentrun.cpp
@@ -4,6 +4,7 @@
 /*!
     \page qtconcurrentrun.html
     \title Concurrent Run
+    \brief A simple way to run a task in a separate thread.
     \ingroup thread
 
     The QtConcurrent::run() function runs a function in a separate thread.
diff --git a/src/concurrent/qtconcurrenttask.qdoc b/src/concurrent/qtconcurrenttask.qdoc
index 6f21ac13959..d3828b59c24 100644
--- a/src/concurrent/qtconcurrenttask.qdoc
+++ b/src/concurrent/qtconcurrenttask.qdoc
@@ -4,6 +4,7 @@
 /*!
     \page qtconcurrenttask.html
     \title Concurrent Task
+    \brief A configurable way to run a task in a separate thread.
     \ingroup thread
 
     QtConcurrent::task provides an alternative interface for running a