diff --git a/tcg/tcg.h b/tcg/tcg.h
index 40c8fbe2ae..01dfebd9a2 100644
--- a/tcg/tcg.h
+++ b/tcg/tcg.h
@@ -595,6 +595,12 @@ struct TCGContext {
 
 extern TCGContext tcg_ctx;
 
+static inline void tcg_set_insn_param(int op_idx, int arg, TCGArg v)
+{
+    int op_argi = tcg_ctx.gen_op_buf[op_idx].args;
+    tcg_ctx.gen_opparam_buf[op_argi + arg] = v;
+}
+
 /* The number of opcodes emitted so far.  */
 static inline int tcg_op_buf_count(void)
 {