diff --git a/tcg/optimize.c b/tcg/optimize.c
index 6b98ec13e6..01e80c3e46 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1261,7 +1261,7 @@ void tcg_optimize(TCGContext *s)
                 uint64_t a = ((uint64_t)ah << 32) | al;
                 uint64_t b = ((uint64_t)bh << 32) | bl;
                 TCGArg rl, rh;
-                TCGOp *op2 = tcg_op_insert_before(s, op, INDEX_op_movi_i32, 2);
+                TCGOp *op2 = tcg_op_insert_before(s, op, INDEX_op_movi_i32);
 
                 if (opc == INDEX_op_add2_i32) {
                     a += b;
@@ -1283,7 +1283,7 @@ void tcg_optimize(TCGContext *s)
                 uint32_t b = arg_info(op->args[3])->val;
                 uint64_t r = (uint64_t)a * b;
                 TCGArg rl, rh;
-                TCGOp *op2 = tcg_op_insert_before(s, op, INDEX_op_movi_i32, 2);
+                TCGOp *op2 = tcg_op_insert_before(s, op, INDEX_op_movi_i32);
 
                 rl = op->args[0];
                 rh = op->args[1];
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 54f1272187..963cb37892 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -2205,16 +2205,14 @@ TCGOp *tcg_emit_op(TCGOpcode opc)
     return op;
 }
 
-TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *old_op,
-                            TCGOpcode opc, int nargs)
+TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *old_op, TCGOpcode opc)
 {
     TCGOp *new_op = tcg_op_alloc(opc);
     QTAILQ_INSERT_BEFORE(old_op, new_op, link);
     return new_op;
 }
 
-TCGOp *tcg_op_insert_after(TCGContext *s, TCGOp *old_op,
-                           TCGOpcode opc, int nargs)
+TCGOp *tcg_op_insert_after(TCGContext *s, TCGOp *old_op, TCGOpcode opc)
 {
     TCGOp *new_op = tcg_op_alloc(opc);
     QTAILQ_INSERT_AFTER(&s->ops, old_op, new_op, link);
@@ -2552,7 +2550,7 @@ static bool liveness_pass_2(TCGContext *s)
                     TCGOpcode lopc = (arg_ts->type == TCG_TYPE_I32
                                       ? INDEX_op_ld_i32
                                       : INDEX_op_ld_i64);
-                    TCGOp *lop = tcg_op_insert_before(s, op, lopc, 3);
+                    TCGOp *lop = tcg_op_insert_before(s, op, lopc);
 
                     lop->args[0] = temp_arg(dir_ts);
                     lop->args[1] = temp_arg(arg_ts->mem_base);
@@ -2621,7 +2619,7 @@ static bool liveness_pass_2(TCGContext *s)
                 TCGOpcode sopc = (arg_ts->type == TCG_TYPE_I32
                                   ? INDEX_op_st_i32
                                   : INDEX_op_st_i64);
-                TCGOp *sop = tcg_op_insert_after(s, op, sopc, 3);
+                TCGOp *sop = tcg_op_insert_after(s, op, sopc);
 
                 sop->args[0] = temp_arg(dir_ts);
                 sop->args[1] = temp_arg(arg_ts->mem_base);
diff --git a/tcg/tcg.h b/tcg/tcg.h
index f9a56a9520..ade692fdf5 100644
--- a/tcg/tcg.h
+++ b/tcg/tcg.h
@@ -1071,8 +1071,8 @@ void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args);
 
 TCGOp *tcg_emit_op(TCGOpcode opc);
 void tcg_op_remove(TCGContext *s, TCGOp *op);
-TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *op, TCGOpcode opc, int narg);
-TCGOp *tcg_op_insert_after(TCGContext *s, TCGOp *op, TCGOpcode opc, int narg);
+TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *op, TCGOpcode opc);
+TCGOp *tcg_op_insert_after(TCGContext *s, TCGOp *op, TCGOpcode opc);
 
 void tcg_optimize(TCGContext *s);