diff --git a/CMakeLists.txt b/CMakeLists.txt
index e8a21986c161a34955fa5a58b6815a510475007a..e31df340542438ce1caf21d1fa5d1d129c0d24bb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -60,6 +60,7 @@ ecm_setup_version(PROJECT VARIABLE_PREFIX LIBKLEO
 add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0)
 remove_definitions( -DQT_NO_CAST_FROM_ASCII )
 add_definitions(-DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT)
+add_definitions(-DQT_NO_URL_CAST_FROM_STRING)
 
 ########### CMake Config Files ###########
 set(CMAKECONFIG_INSTALL_DIR "${KDE_INSTALL_CMAKEPACKAGEDIR}/KF5Libkleo")