Index: head/lib/libthr/Makefile
===================================================================
--- head/lib/libthr/Makefile
+++ head/lib/libthr/Makefile
@@ -17,6 +17,7 @@
 LIB=thr
 SHLIB_MAJOR= 3
 WARNS?=	3
+NO_WTHREAD_SAFETY=1
 CFLAGS+=-DPTHREAD_KERNEL
 CFLAGS+=-I${SRCTOP}/lib/libc/include -I${.CURDIR}/thread \
 	-I${SRCTOP}/include