Index: src/libcfa/concurrency/coroutines
===================================================================
--- src/libcfa/concurrency/coroutines	(revision 7fbe45024a0e66932c8f18b15610b0c295b507fa)
+++ src/libcfa/concurrency/coroutines	(revision dcb42b8657f59146a4e13e740761ef8af2db06e3)
@@ -29,4 +29,6 @@
       coroutine * get_coroutine(T * this);
 };
+
+#define DECL_COROUTINE(X) static inline coroutine* get_coroutine(X* this) { return &this->c; } void main(X* this);
 
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