diff --git a/cfg/qt.cfg b/cfg/qt.cfg
index cdb25a166..43a663387 100644
--- a/cfg/qt.cfg
+++ b/cfg/qt.cfg
@@ -4624,6 +4624,7 @@
   <define name="Q_DECL_IMPORT" value=""/>
   <define name="QT_DECLARE_DEPRECATED_TR_FUNCTIONS(context)" value="static inline QString trUtf8(const char *sourceText, const char *disambiguation = Q_NULLPTR, int n = -1) { return QCoreApplication::translate(#context, sourceText, disambiguation, n); }"/>
   <define name="Q_DECLARE_FLAGS(x,y)" value=""/>
+  <define name="Q_DECLARE_INTERFACE(ClassName,Identifier)" value=""/>
   <define name="Q_DECLARE_LOGGING_CATEGORY(name)" value="extern const QLoggingCategory &amp;name();"/>
   <define name="Q_DECLARE_OPERATORS_FOR_FLAGS(x)" value=""/>
   <define name="Q_DECLARE_METATYPE(x)" value=""/>