diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,6 +20,10 @@
 include(ECMSetupVersion)
 include(FeatureSummary)
 include(ECMQtDeclareLoggingCategory)
+include(ECMAddQch)
+
+option(BUILD_QCH "Build API documentation in QCH format (for e.g. Qt Assistant, Qt Creator & KDevelop)" OFF)
+add_feature_info(QCH ${BUILD_QCH} "API documentation in QCH format (for e.g. Qt Assistant, Qt Creator & KDevelop)")
 
 # TODO: remove for KF6
 option(KCALENDARCORE_NO_DEPRECATED_NAMESPACE "Disable deprecated KCalCore namespace" OFF)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -151,3 +151,25 @@
 
 ecm_generate_pri_file(BASE_NAME KCalendarCore LIB_NAME KF5CalendarCore DEPS "Core" FILENAME_VAR PRI_FILENAME INCLUDE_INSTALL_DIR ${KDE_INSTALL_INCLUDEDIR_KF5}/KCalendarCore/KCalendarCore)
 install(FILES ${PRI_FILENAME} DESTINATION ${ECM_MKSPECS_INSTALL_DIR})
+
+if(BUILD_QCH)
+    ecm_add_qch(
+        KF5CalendarCore_QCH
+        NAME KCalendarCore
+        BASE_NAME KF5CalendarCore
+        VERSION ${KCalendarCore_VERSION}
+        ORG_DOMAIN org.kde
+        SOURCES # using only public headers, to cover only public API
+            ${KCalCore_HEADERS}
+        MD_MAINPAGE "${CMAKE_SOURCE_DIR}/README.md"
+        LINK_QCHS
+            Qt5Core_QCH
+        INCLUDE_DIRS
+            ${CMAKE_CURRENT_BINARY_DIR}
+        BLANK_MACROS
+            KCALENDARCORE_EXPORT
+        TAGFILE_INSTALL_DESTINATION ${KDE_INSTALL_QTQCHDIR}
+        QCH_INSTALL_DESTINATION ${KDE_INSTALL_QTQCHDIR}
+        COMPONENT Devel
+    )
+endif()