diff --git a/sys/rump/librump/rumpkern/Makefile.rumpkern b/sys/rump/librump/rumpkern/Makefile.rumpkern
index 5edbeb8bb5ba..775c89141262 100644
--- a/sys/rump/librump/rumpkern/Makefile.rumpkern
+++ b/sys/rump/librump/rumpkern/Makefile.rumpkern
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile.rumpkern,v 1.62 2009/11/04 19:21:51 pooka Exp $
+#	$NetBSD: Makefile.rumpkern,v 1.63 2009/11/06 16:16:59 pooka Exp $
 #
 
 .include "${RUMPTOP}/Makefile.rump"
@@ -60,8 +60,8 @@ SRCS+=	clock_subr.c
 # Comment these if you want to use malloc(3) directly instead of
 # the kernel allocators.  It's a few percent faster, but doesn't
 # emulate all kernel corner cases as well.
-#CPPFLAGS+=	-DRUMP_USE_REAL_ALLOCATORS
-#SRCS+=		subr_kmem.c subr_pool.c subr_vmem.c
+CPPFLAGS+=	-DRUMP_USE_REAL_ALLOCATORS
+SRCS+=		subr_kmem.c subr_pool.c subr_vmem.c
 
 # no shlib_version because this is automatically in sync with lib/librump
 SHLIB_MAJOR=    0