diff --git a/cmake/QtBuild.cmake b/cmake/QtBuild.cmake
index 48c38f3d8a..4c5a7a6019 100644
--- a/cmake/QtBuild.cmake
+++ b/cmake/QtBuild.cmake
@@ -1978,7 +1978,13 @@ set(QT_CMAKE_EXPORT_NAMESPACE ${QT_CMAKE_EXPORT_NAMESPACE})")
     if(NOT arg_NO_SYNC_QT)
         list(APPEND interface_includes "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>")
 
-        if(NOT arg_NO_MODULE_HEADERS)
+        # syncqt.pl does not create a private header directory like 'include/6.0/QtFoo' unless
+        # the module has foo_p.h header files. For QtZlib, there are no such private headers, so we
+        # need to make sure not to add such include paths unless the directory exists, otherwise
+        # consumers of the module will fail at CMake generation time stating that
+        # INTERFACE_INCLUDE_DIRECTORIES contains a non-existent path.
+        if(NOT arg_NO_MODULE_HEADERS
+                AND EXISTS "${module_include_dir}/${PROJECT_VERSION}/${module}")
             list(APPEND interface_includes
                         "$<BUILD_INTERFACE:${module_include_dir}/${PROJECT_VERSION}>"
                         "$<BUILD_INTERFACE:${module_include_dir}/${PROJECT_VERSION}/${module}>")