-#ifdef PERL_OP_PARENT
-# define OpHAS_SIBLING(o) (cBOOL((o)->op_moresib))
-# define OpSIBLING(o) (0 + (o)->op_moresib ? (o)->op_sibparent : NULL)
-# define OpMORESIB_set(o, sib) ((o)->op_moresib = 1, (o)->op_sibparent = (sib))
-# define OpLASTSIB_set(o, parent) \
- ((o)->op_moresib = 0, (o)->op_sibparent = (parent))
-# define OpMAYBESIB_set(o, sib, parent) \
- ((o)->op_sibparent = ((o)->op_moresib = cBOOL(sib)) ? (sib) : (parent))
-#else
-# define OpHAS_SIBLING(o) (cBOOL((o)->op_sibling))
-# define OpSIBLING(o) (0 + (o)->op_sibling)
-# define OpMORESIB_set(o, sib) ((o)->op_moresib = 1, (o)->op_sibling = (sib))
-# define OpLASTSIB_set(o, parent) \
- ((o)->op_moresib = 0, (o)->op_sibling = NULL)
-# define OpMAYBESIB_set(o, sib, parent) \
- ((o)->op_moresib = cBOOL(sib), (o)->op_sibling = (sib))
-#endif
+#define OpHAS_SIBLING(o) (cBOOL((o)->op_moresib))
+#define OpSIBLING(o) (0 + (o)->op_moresib ? (o)->op_sibparent : NULL)
+#define OpMORESIB_set(o, sib) ((o)->op_moresib = 1, (o)->op_sibparent = (sib))
+#define OpLASTSIB_set(o, parent) \
+ ((o)->op_moresib = 0, (o)->op_sibparent = (parent))
+#define OpMAYBESIB_set(o, sib, parent) \
+ ((o)->op_sibparent = ((o)->op_moresib = cBOOL(sib)) ? (sib) : (parent))