diff --git a/cmake/QtPriHelpers.cmake b/cmake/QtPriHelpers.cmake
index 2223b146809..0c5a80c118e 100644
--- a/cmake/QtPriHelpers.cmake
+++ b/cmake/QtPriHelpers.cmake
@@ -246,7 +246,7 @@ function(qt_generate_module_pri_file target)
     if (arg_INTERNAL_MODULE)
         string(APPEND config_module_name "_private")
         # Internal module pri needs to provide private headers
-        set(public_module_includes "${private_module_includes}")
+        set(public_module_includes "${public_module_includes} ${private_module_includes}")
     endif()
 
     qt_path_join(target_path ${QT_BUILD_DIR} ${INSTALL_MKSPECSDIR}/modules)