diff --git a/doc/src/platforms/supported-platforms.qdocinc b/doc/src/platforms/supported-platforms.qdocinc
index e340f2250aed8cb9fbcc263b3c4420f781bc5e95..c54a721d935fd111b34238a362c70e97f89f326e 100644
--- a/doc/src/platforms/supported-platforms.qdocinc
+++ b/doc/src/platforms/supported-platforms.qdocinc
@@ -40,7 +40,7 @@ Mobile Platforms: \l {Qt for Android}{Android},
 
 //! [all]
 \section1 Qt 5.9
-\b {Supported until one year after release}
+\b {Long-term support (LTS)}: Supported until three years after release
 
 //! [5.9] //! [latest]
 
@@ -272,7 +272,7 @@ Mobile Platforms: \l {Qt for Android}{Android},
     \section1 Qt 5.6
 
 //! [5.6]
-    \b {Supported until Mar. 16, 2019}
+    \b {Long-term support (LTS)}: Supported until Mar. 16, 2019
 
     \table 80%
     \header \li Platform \li Compiler \li Notes
diff --git a/doc/src/whatsnew/whatsnew56.qdoc b/doc/src/whatsnew/whatsnew56.qdoc
index ed176b392ead372f9b4f00b5bdd2bcc5f124dc53..494539416c280ff3287599d603d4d4b60dd42c7d 100644
--- a/doc/src/whatsnew/whatsnew56.qdoc
+++ b/doc/src/whatsnew/whatsnew56.qdoc
@@ -30,6 +30,8 @@
     \title What's New in Qt 5.6
     \brief Lists the new features in Qt 5.6.
 
+    Qt 5.6 is a long-term support (LTS) release.
+
     \section1 New Modules
 
     \list
diff --git a/doc/src/whatsnew/whatsnew59.qdoc b/doc/src/whatsnew/whatsnew59.qdoc
index a54cc70518ee7fc809b2b09b48dd5460b4dc1fb6..29ccad60f48f1bba8657b97e212cede49bb366a6 100644
--- a/doc/src/whatsnew/whatsnew59.qdoc
+++ b/doc/src/whatsnew/whatsnew59.qdoc
@@ -30,6 +30,8 @@
     \title What's New in Qt 5.9
     \brief Lists the new features in Qt 5.9.
 
+    Qt 5.9 is a long-term support (LTS) release.
+
     \section1 New Features in Qt 5.9
 
     \section2 Qt Core Module