diff --git a/src/webengine/doc/src/qtwebengine-platform-notes.qdoc b/src/webengine/doc/src/qtwebengine-platform-notes.qdoc
index 068d395b643dd88e3cc229a39d7cdf4dac9d329c..6a93305832a891328942e73f6a5d260e9de6ab80 100644
--- a/src/webengine/doc/src/qtwebengine-platform-notes.qdoc
+++ b/src/webengine/doc/src/qtwebengine-platform-notes.qdoc
@@ -112,6 +112,20 @@
     \note Qt WebEngine cannot be built for the 32-bit mode of \macos (using the
     \c macx-clang-32 \c mkspec).
 
+    \section1 Using Earlier Qt Versions to Build Qt WebEngine
+
+    Building Qt WebEngine with earlier Qt versions (down to the last LTS
+    version) is supported. It means that Qt WebEngine 5.11 can be built with
+    Qt 5.9.x, Qt 5.10.x, and Qt 5.11.
+
+    To use an earlier Qt version to build Qt Webengine:
+
+    \list 1
+        \li Download the qtwebengine sources.
+        \li From the earlier Qt version, run
+            \c {qmake && make (&& make install)}.
+    \endlist
+
     \section1 Mac App Store Compatibility
 
     Applications using Qt WebEngine are not compatible with the Mac App Store, because: