diff --git a/CMakeLists.txt b/CMakeLists.txt
index d49e55b2e3a..c090f2a54b8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -451,12 +451,17 @@ if(WITH_CORE)
   endif()
 
   find_package(${QT_VERSION_BASE} COMPONENTS Core Gui Widgets Network Xml Svg Concurrent Test UiTools Sql REQUIRED)
+  if (WITH_QT6)
+    find_package(${QT_VERSION_BASE} COMPONENTS Core5Compat REQUIRED)
+  else()
+    # TODO only available starting from Qt 6.2
+    find_package(${QT_VERSION_BASE} COMPONENTS Positioning)
+  endif()
   if (NOT IOS)
     find_package(${QT_VERSION_BASE} COMPONENTS PrintSupport REQUIRED)
   else()
     add_definitions(-DQT_NO_PRINTER)
   endif()
-  find_package(${QT_VERSION_BASE} COMPONENTS Positioning)
   if (WITH_QTWEBKIT AND NOT WITH_QT6)
     find_package(Qt5WebKit REQUIRED)
     find_package(Qt5WebKitWidgets REQUIRED)
@@ -506,18 +511,14 @@ if(WITH_CORE)
   endif()
 
   # Password helper
-  if (WITH_QT6)
-    # nope, not yet!
-  else()
-    find_package(QtKeychain REQUIRED)
-    # Master password hash and authentication encryption
-    find_package(QCA REQUIRED)
-    # Check for runtime dependency of qca-ossl plugin
-    # REQUIRED if unit tests are to be run from build directory
-    if(NOT MSVC)
-      include(QCAMacros)
-      FIND_QCAOSSL_PLUGIN_CPP(ENABLE_TESTS)
-    endif()
+  find_package(QtKeychain REQUIRED)
+  # Master password hash and authentication encryption
+  find_package(QCA REQUIRED)
+  # Check for runtime dependency of qca-ossl plugin
+  # REQUIRED if unit tests are to be run from build directory
+  if(NOT MSVC)
+    include(QCAMacros)
+    FIND_QCAOSSL_PLUGIN_CPP(ENABLE_TESTS)
   endif()
 
   if (APPLE)
diff --git a/cmake/FindQCA.cmake b/cmake/FindQCA.cmake
index 1258e415932..5b0d460c13a 100644
--- a/cmake/FindQCA.cmake
+++ b/cmake/FindQCA.cmake
@@ -20,7 +20,7 @@ if(QCA_INCLUDE_DIR AND QCA_LIBRARY)
 
 else(QCA_INCLUDE_DIR AND QCA_LIBRARY)
 
-  set(QCA_LIBRARY_NAMES qca-qt5 qca2-qt5)
+  set(QCA_LIBRARY_NAMES qca-qt5 qca2-qt5 qca-qt6)
 
   find_library(QCA_LIBRARY
     NAMES ${QCA_LIBRARY_NAMES}
@@ -45,7 +45,7 @@ else(QCA_INCLUDE_DIR AND QCA_LIBRARY)
       "$ENV{LIB_DIR}/include"
       $ENV{INCLUDE}
       /usr/local/include
-      PATH_SUFFIXES QtCrypto qt5/QtCrypto Qca-qt5/QtCrypto qt/Qca-qt5/QtCrypto qt5/Qca-qt5/QtCrypto
+      PATH_SUFFIXES QtCrypto qt5/QtCrypto Qca-qt5/QtCrypto qt/Qca-qt5/QtCrypto qt5/Qca-qt5/QtCrypto Qca-qt6/QtCrypto
   )
 
   if(QCA_LIBRARY AND QCA_INCLUDE_DIR)
diff --git a/cmake/FindQtKeychain.cmake b/cmake/FindQtKeychain.cmake
index 7c9279ca90c..4f4b723a4cc 100644
--- a/cmake/FindQtKeychain.cmake
+++ b/cmake/FindQtKeychain.cmake
@@ -21,10 +21,10 @@ FIND_PATH(QTKEYCHAIN_INCLUDE_DIR keychain.h
   $ENV{INCLUDE}
   /usr/local/include
   /usr/include
-  PATH_SUFFIXES qt5keychain qtkeychain
+  PATH_SUFFIXES qt5keychain qtkeychain qt6keychain
 )
 
-FIND_LIBRARY(QTKEYCHAIN_LIBRARY NAMES qt5keychain qtkeychain
+FIND_LIBRARY(QTKEYCHAIN_LIBRARY NAMES qt5keychain qtkeychain qt6keychain
   PATHS
   ${LIB_DIR}
   "$ENV{LIB_DIR}"
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 6a27b2f4873..b84eb14545c 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -1925,6 +1925,10 @@ target_link_libraries(qgis_core
   ${ZLIB_LIBRARIES}
 )
 
+if (WITH_QT6)
+  target_link_libraries(qgis_core Qt6::Core5Compat)
+endif()
+
 if (WITH_EPT)
   target_link_libraries(qgis_core
     ${ZSTD_LIBRARY}