diff --git a/share/mk/bsd.own.mk b/share/mk/bsd.own.mk
index cb14676279b6..3f171a367d3c 100644
--- a/share/mk/bsd.own.mk
+++ b/share/mk/bsd.own.mk
@@ -178,6 +178,10 @@ COMPRESS_EXT?=	.gz
 # The NO_* variables should only be set by makefiles.
 #
 
+.if ${MACHINE_ARCH} == "amd64"
+_LIB32=		LIB32
+.endif
+
 #
 # Supported NO_* options (if defined, MK_* will be forced to "no",
 # regardless of user's setting).
@@ -232,7 +236,7 @@ WITHOUT_${var}=
     IPFILTER \
     IPX \
     KERBEROS \
-    LIB32 \
+    ${_LIB32} \
     LIBC_R \
     LIBPTHREAD \
     LIBTHR \
@@ -318,7 +322,7 @@ WITH_IDEA=
     IPFILTER \
     IPX \
     KERBEROS \
-    LIB32 \
+    ${_LIB32} \
     LIBC_R \
     LIBPTHREAD \
     LIBTHR \