diff --git a/CMakeModules/FindQJSON.cmake b/CMakeModules/FindQJSON.cmake
index 5460a0a96..6684d9bfc 100644
--- a/CMakeModules/FindQJSON.cmake
+++ b/CMakeModules/FindQJSON.cmake
@@ -44,7 +44,7 @@ else (QJSON_INCLUDE_DIR AND QJSON_LIBRARIES)
   find_package_handle_standard_args(QJSON DEFAULT_MSG QJSON_LIBRARIES QJSON_INCLUDE_DIR)
 
   if ( WIN32 OR ( UNIX AND NOT APPLE ) )
-    set ( QJSON_LIBRARIES "${QJSON_LIBRARIES} ${QJSON_LDFLAGS}" )
+    set ( QJSON_LIBRARIES "${QJSON_LIBRARIES} ${QJSON_LDFLAGS}" CACHE INTERNAL "")
   endif ()
 
 endif (QJSON_INCLUDE_DIR AND QJSON_LIBRARIES)