diff --git a/cmake/QtDbusHelpers.cmake b/cmake/QtDbusHelpers.cmake
index db113b0d982..ad796ca69d7 100644
--- a/cmake/QtDbusHelpers.cmake
+++ b/cmake/QtDbusHelpers.cmake
@@ -79,4 +79,9 @@ function(qt_create_qdbusxml2cpp_command target infile)
         "${header_file_full}"
         "${source_file_full}"
     )
+    set_source_files_properties(
+        "${header_file_full}"
+        "${source_file_full}"
+        PROPERTIES
+            _qt_syncqt_exclude_from_docs TRUE)
 endfunction()
diff --git a/cmake/QtModuleHelpers.cmake b/cmake/QtModuleHelpers.cmake
index bdf00c68b64..fdcbb700899 100644
--- a/cmake/QtModuleHelpers.cmake
+++ b/cmake/QtModuleHelpers.cmake
@@ -1196,8 +1196,11 @@ function(qt_finalize_module target)
     # property which supposed to be updated inside every qt_internal_install_module_headers
     # call.
     qt_internal_add_headersclean_target(${target} "${module_headers_public}")
-    qt_internal_target_sync_headers(${target} "${module_headers_all}"
-        "${module_headers_generated}")
+    qt_internal_target_sync_headers(${target}
+        "${module_headers_all}"
+        "${module_headers_generated}"
+        "${module_headers_exclude_from_docs}"
+    )
     get_target_property(module_depends_header ${target} _qt_module_depends_header)
     qt_internal_install_module_headers(${target}
         PUBLIC ${module_headers_public} "${module_depends_header}"
@@ -1627,6 +1630,7 @@ endfunction()
 function(qt_internal_collect_module_headers out_var target)
     set(${out_var}_public "")
     set(${out_var}_private "")
+    set(${out_var}_exclude_from_docs "")
     set(${out_var}_qpa "")
     set(${out_var}_rhi "")
     set(${out_var}_ssg "")
@@ -1698,6 +1702,12 @@ function(qt_internal_collect_module_headers out_var target)
             set(is_3rdparty_header FALSE)
         endif()
         list(APPEND ${out_var}_all "${file_path}")
+
+        get_source_file_property(exclude_from_docs "${file_path}" _qt_syncqt_exclude_from_docs)
+        if(exclude_from_docs)
+            list(APPEND ${out_var}_exclude_from_docs "${file_path}")
+        endif()
+
         if(qpa_filter AND file_name MATCHES "${qpa_filter}")
             list(APPEND ${out_var}_qpa "${file_path}")
         elseif(rhi_filter AND file_name MATCHES "${rhi_filter}")
@@ -1740,6 +1750,7 @@ function(qt_internal_collect_module_headers out_var target)
     endforeach()
     set(${out_var}_all "${${out_var}_all}" PARENT_SCOPE)
     set(${out_var}_generated "${${out_var}_generated}" PARENT_SCOPE)
+    set(${out_var}_exclude_from_docs "${${out_var}_exclude_from_docs}" PARENT_SCOPE)
 
     if(has_header_types_properties)
         set_target_properties(${target} PROPERTIES ${has_header_types_properties})
diff --git a/cmake/QtSyncQtHelpers.cmake b/cmake/QtSyncQtHelpers.cmake
index 0188b87c6ab..96669a03c32 100644
--- a/cmake/QtSyncQtHelpers.cmake
+++ b/cmake/QtSyncQtHelpers.cmake
@@ -6,7 +6,11 @@
 # QT_REPO_PUBLIC_NAMESPACE_REGEX cache variable, that can be set by repository in .cmake.conf file.
 # The variable tells the syncqt program, what namespaces are treated as public. Symbols in public
 # namespaces are considered when generating CaMeL case header files.
-function(qt_internal_target_sync_headers target module_headers module_headers_generated)
+function(qt_internal_target_sync_headers target
+        module_headers
+        module_headers_generated
+        module_headers_exclude_from_docs
+    )
     if(NOT TARGET ${QT_CMAKE_EXPORT_NAMESPACE}::syncqt)
         message(FATAL_ERROR "${QT_CMAKE_EXPORT_NAMESPACE}::syncqt is not a target.")
     endif()
@@ -146,6 +150,11 @@ function(qt_internal_target_sync_headers target module_headers module_headers_ge
     list(FILTER module_headers EXCLUDE REGEX
         "(.+/(ui_)[^/]+\\.h|${CMAKE_CURRENT_SOURCE_DIR}(/.+)?/doc/+\\.h)")
 
+    # Filter out all headers that should be excluded from documentation generation.
+    # Documentation generation shouldn't depend on headers like the dbus-generated ones.
+    set(module_headers_for_docs "${module_headers}")
+    list(REMOVE_ITEM module_headers_for_docs ${module_headers_exclude_from_docs})
+
     set(syncqt_staging_dir "${module_build_interface_include_dir}/.syncqt_staging")
 
     set(syncqt_args "${common_syncqt_arguments}")
@@ -225,10 +234,16 @@ function(qt_internal_target_sync_headers target module_headers module_headers_ge
             "@${syncqt_all_args_rsp}"
         ${external_headers_dir_copy_cmd}
         DEPENDS
-            ${module_headers}
+            # Note, we don't depend anymore on ${target}_sync_headers so that we don't bring
+            # in the headers that are usually excluded from docs.
+            # This means if someone manually calls
+            # `ninja sync_all_public_headers Gui_sync_headers` it will cause havoc due to two
+            # syncqt calls accessing the same files concurrently. This is an edge case that should
+            # not happen, but it ends up happening, we will have to implement some kind of lock
+            # file mechanism.
+            ${module_headers_for_docs}
             ${syncqt_all_args_rsp}
             ${QT_CMAKE_EXPORT_NAMESPACE}::syncqt
-            ${target}_sync_headers
         VERBATIM
     )
 
diff --git a/src/gui/CMakeLists.txt b/src/gui/CMakeLists.txt
index 0002c33ae5d..cd4f6c8d2df 100644
--- a/src/gui/CMakeLists.txt
+++ b/src/gui/CMakeLists.txt
@@ -1001,6 +1001,7 @@ add_custom_command(
     WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
     VERBATIM
 )
+set_source_files_properties(${vulkan_fun_outputs} PROPERTIES _qt_syncqt_exclude_from_docs TRUE)
 
 qt_internal_extend_target(Gui CONDITION WASM
     SOURCES