diff --git a/lib/libthr/Makefile b/lib/libthr/Makefile
index 60cb420cb8c4..ffdb7b86b834 100644
--- a/lib/libthr/Makefile
+++ b/lib/libthr/Makefile
@@ -16,8 +16,8 @@ MK_SSP=	no
 
 LIB=thr
 SHLIB_MAJOR= 3
-WARNS?=	3
 NO_WTHREAD_SAFETY=1
+NO_WCAST_ALIGN.gcc=1    # for gcc 4.2
 CFLAGS+=-DPTHREAD_KERNEL
 CFLAGS+=-I${SRCTOP}/lib/libc/include -I${.CURDIR}/thread \
 	-I${SRCTOP}/include