diff --git a/CMakeLists.txt b/CMakeLists.txt
index 61e255f..c1139be 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -70,6 +70,7 @@ add_definitions(
   -DQT_STRICT_ITERATORS
   -DQT_NO_URL_CAST_FROM_STRING
   -DQT_NO_CAST_FROM_BYTEARRAY
+  -DQT_NO_CAST_TO_BYTEARRAY
   -DQT_NO_SIGNALS_SLOTS_KEYWORDS
   -DQT_USE_FAST_OPERATOR_PLUS
 )