Index: libcfa/src/concurrency/kernel.cfa
===================================================================
--- libcfa/src/concurrency/kernel.cfa	(revision 58b6d1b3b8da710a22441043f60cb988a2c2e56d)
+++ libcfa/src/concurrency/kernel.cfa	(revision fc846ae1acddff210b81091b8b89c32961a0002c)
@@ -833,7 +833,9 @@
 // Debug
 __cfaabi_dbg_debug_do(
-	void __cfaabi_dbg_record(__spinlock_t & this, const char * prev_name) {
-		this.prev_name = prev_name;
-		this.prev_thrd = kernelTLS.this_thread;
+	extern "C" {
+		void __cfaabi_dbg_record(__spinlock_t & this, const char * prev_name) {
+			this.prev_name = prev_name;
+			this.prev_thrd = kernelTLS.this_thread;
+		}
 	}
 )