diff --git a/plat/osx386/descr b/plat/osx386/descr
index afe46c588..045d2e720 100644
--- a/plat/osx386/descr
+++ b/plat/osx386/descr
@@ -8,6 +8,8 @@ var s=2
 var sa={s}
 var l={w}
 var la={w}
+var q=8
+var qa=4
 var f={w}
 var fa={w}
 var d=8
@@ -17,11 +19,12 @@ var xa={x}
 var ARCH=i386
 var PLATFORM=osx386
 var PLATFORMDIR={EM}/share/ack/{PLATFORM}
-var CPP_F=-D__unix
+var CPP_F=-D__unix -D_EM_LLSIZE={q}
 var ALIGN=-a0:4 -a1:4 -a2:4096 -a3:4 -b0:0x123c
 var C_LIB={PLATFORMDIR}/libc-ansi.a
 # bitfields reversed for compatibility with (g)cc.
-var CC_ALIGN=-Vr
+# long long enabled.
+var CC_ALIGN=-Vrq{q}.{qa}
 var OLD_C_LIB={C_LIB}
 var MACHOPT_F=-m10
 var EGO_PLAT_FLAGS=-M{EM}/share/ack/ego/{ARCH}.descr