@@ -438,11 +438,18 @@
 		])
 		;;
 	esac
 
 	AC_DEFINE(OF_THREADS, 1, [Whether we have threads])
-	AC_SUBST(OFTHREAD_M, "OFThread.m")
+	AC_SUBST(THREADING_SOURCES, "	\
+		OFThread.m		\
+		OFThreadPool.m		\
+		OFTLSKey.m		\
+		OFMutex.m		\
+		OFRecursiveMutex.m	\
+		OFCondition.m		\
+	")
 	AC_SUBST(OFTHREADTESTS_M, "OFThreadTests.m")
 	AC_SUBST(OFHTTPREQUESTTESTS_M, "OFHTTPRequestTests.m")
 	AC_SUBST(THREADING_H, "threading.h")
 
 	AC_MSG_CHECKING(whether __thread works)