Index: libcfa/src/concurrency/kernel/startup.cfa
===================================================================
--- libcfa/src/concurrency/kernel/startup.cfa	(revision ab5baab37dfc15fb59352931de6e2341522ad938)
+++ libcfa/src/concurrency/kernel/startup.cfa	(revision 43784ac7ca1579ca19d7dc8bc4e1423986fd4d97)
@@ -15,4 +15,5 @@
 
 #define __cforall_thread__
+#define _GNU_SOURCE
 
 // C Includes
@@ -336,4 +337,8 @@
 	register_tls( proc );
 
+	#if defined(CFA_HAVE_LINUX_LIBRSEQ)
+		rseq_register_current_thread();
+	#endif
+
 	// SKULLDUGGERY: We want to create a context for the processor coroutine
 	// which is needed for the 2-step context switch. However, there is no reason