Forgot a constant

basis/compiler/constants/constants.factor

@@ -37,14 +37,15 @@ IN: compiler.constants
 : rc-indirect-arm-pc  8 ; inline
 
 ! Relocation types
-: rt-primitive 0 ; inline
-: rt-dlsym     1 ; inline
-: rt-literal   2 ; inline
-: rt-dispatch  3 ; inline
-: rt-xt        4 ; inline
-: rt-here      5 ; inline
-: rt-label     6 ; inline
-: rt-immediate 7 ; inline
+: rt-primitive   0 ; inline
+: rt-dlsym       1 ; inline
+: rt-literal     2 ; inline
+: rt-dispatch    3 ; inline
+: rt-xt          4 ; inline
+: rt-here        5 ; inline
+: rt-label       6 ; inline
+: rt-immediate   7 ; inline
+: rt-stack-chain 8 ; inline
 
 : rc-absolute? ( n -- ? )
     [ rc-absolute-ppc-2/2 = ]