diff --git a/common/lib/libc/arch/arm/atomic/Makefile.inc b/common/lib/libc/arch/arm/atomic/Makefile.inc
index 9f0233780..2d1c864e9 100644
--- a/common/lib/libc/arch/arm/atomic/Makefile.inc
+++ b/common/lib/libc/arch/arm/atomic/Makefile.inc
@@ -1,7 +1,7 @@
 #	$NetBSD: Makefile.inc,v 1.8 2009/01/04 17:54:29 pooka Exp $
 
 .if defined(LIB) && (${LIB} == "kern" || ${LIB} == "c" || ${LIB} == "pthread" \
-	|| ${LIB} == "rump")
+	|| ${LIB} == "rump" || (defined(__MINIX) && ${LIB} == "sys"))
 
 SRCS+=	atomic_add_32_cas.c atomic_add_32_nv_cas.c atomic_and_32_cas.c \
 	atomic_and_32_nv_cas.c atomic_dec_32_cas.c atomic_dec_32_nv_cas.c \
diff --git a/common/lib/libc/atomic/atomic_init_testset.c b/common/lib/libc/atomic/atomic_init_testset.c
index 9769d62b5..74baecf12 100644
--- a/common/lib/libc/atomic/atomic_init_testset.c
+++ b/common/lib/libc/atomic/atomic_init_testset.c
@@ -112,11 +112,14 @@ _atomic_cas_32(volatile uint32_t *ptr, uint32_t old, uint32_t new)
 void
 __libc_atomic_init(void)
 {
+#if !defined(__minix)
 	int ncpu, mib[2];
 	size_t len;
+#endif
 
 	_atomic_cas_fn = _atomic_cas_mp;
 
+#if !defined(__minix)
 	mib[0] = CTL_HW;
 	mib[1] = HW_NCPU; 
 	len = sizeof(ncpu);
@@ -129,6 +132,7 @@ __libc_atomic_init(void)
 		_atomic_cas_fn = _atomic_cas_up;
 		return;
 	}
+#endif
 }
 
 #undef atomic_cas_32