diff --git a/src/plugins/platforms/xcb/qxcbconnection.cpp b/src/plugins/platforms/xcb/qxcbconnection.cpp
index 209c7bb187b..f944b65a57a 100644
--- a/src/plugins/platforms/xcb/qxcbconnection.cpp
+++ b/src/plugins/platforms/xcb/qxcbconnection.cpp
@@ -1397,7 +1397,7 @@ static const char * xcb_atomnames = {
 #if XCB_USE_MAEMO_WINDOW_PROPERTIES
     "_MEEGOTOUCH_ORIENTATION_ANGLE\0"
 #endif
-    "_XSETTINGS_SETTINGS"
+    "_XSETTINGS_SETTINGS\0" // \0\0 terminates loop.
 };
 
 xcb_atom_t QXcbConnection::atom(QXcbAtom::Atom atom)