diff --git a/OPTYap/or.macros.h b/OPTYap/or.macros.h
index e9d9a74b3..2329be1ff 100644
--- a/OPTYap/or.macros.h
+++ b/OPTYap/or.macros.h
@@ -81,8 +81,8 @@ STD_PROTO(static inline qg_sol_fr_ptr CUT_prune_solution_frames, (qg_sol_fr_ptr,
 #define YAMOP_CUT(INST)            (((INST)->u.Otapl.or_arg) & YAMOP_CUT_FLAG)
 #define YAMOP_FLAGS(INST)          (((INST)->u.Otapl.or_arg) & YAMOP_FLAGS_BITS)
 
-#define INIT_YAMOP_LTT(INST, LTT)  (INST)->u.Otapl.or_arg = LTT
-#define PUT_YAMOP_LTT(INST, LTT)   (INST)->u.Otapl.or_arg = YAMOP_FLAGS(INST) | (LTT)
+#define INIT_YAMOP_LTT(INST, LTT)  ((INST)->u.Otapl.or_arg = LTT+1)
+#define PUT_YAMOP_LTT(INST, LTT)   (INST)->u.Otapl.or_arg = YAMOP_FLAGS(INST) | (LTT+1)
 #define PUT_YAMOP_SEQ(INST)        (INST)->u.Otapl.or_arg |= YAMOP_SEQ_FLAG
 #define PUT_YAMOP_CUT(INST)        (INST)->u.Otapl.or_arg |= YAMOP_CUT_FLAG