diff -ur a/gui/gui.pro b/gui/gui.pro
--- a/gui/gui.pro	2020-10-03 11:05:53.000000000 +0200
+++ b/gui/gui.pro	2020-10-17 15:49:15.523989000 +0200
@@ -13,10 +13,10 @@
 QT += help
 
 # Build online help
-#onlinehelp.target = online-help.qhc
-#onlinehelp.commands = qhelpgenerator $$PWD/help/online-help.qhp -o online-help.qch ; qhelpgenerator $$PWD/help/online-help.qhcp -o online-help.qhc
-#QMAKE_EXTRA_TARGETS += onlinehelp
-#PRE_TARGETDEPS += online-help.qhc
+onlinehelp.target = online-help.qhc
+onlinehelp.commands = qhelpgenerator $$PWD/help/online-help.qhcp -o $$PWD/help/online-help.qhc
+QMAKE_EXTRA_TARGETS += onlinehelp
+PRE_TARGETDEPS += online-help.qhc
 
 contains(LINKCORE, [yY][eE][sS]) {
     LIBS += -l../bin/cppcheck-core
diff -ur a/gui/helpdialog.cpp b/gui/helpdialog.cpp
--- a/gui/helpdialog.cpp	2020-10-03 11:05:53.000000000 +0200
+++ b/gui/helpdialog.cpp	2020-10-17 11:08:41.117532800 +0200
@@ -32,6 +32,7 @@
     paths << (datadir + "/help")
           << datadir
           << (QApplication::applicationDirPath() + "/help")
+          << (QApplication::applicationDirPath() + "/../share/cppcheck/help")
           << QApplication::applicationDirPath();
     for (QString p: paths) {
         QString filename = p + "/online-help.qhc";