Index: src/OFThread.h
==================================================================
--- src/OFThread.h
+++ src/OFThread.h
@@ -57,11 +57,11 @@
  * To use it, you should create a new class derived from it and reimplement
  * main.
  */
 @interface OFThread: OFObject
 {
-	OFObject <OFCopying> *object;
+	id object;
 	of_thread_t thread;
 	BOOL running;
 
 @public
 	id retval;

Index: tests/objc_sync/Makefile
==================================================================
--- tests/objc_sync/Makefile
+++ tests/objc_sync/Makefile
@@ -22,5 +22,6 @@
 
 include ../../buildsys.mk
 
 CPPFLAGS += -I../../src -I../..
 LIBS := -L../../src -lobjfw ${LIBS}
+LD = ${OBJC}