diff --git a/runtime/interpreter/interpreter_common.cc b/runtime/interpreter/interpreter_common.cc
index ef3c6e2..ae67efb 100644
--- a/runtime/interpreter/interpreter_common.cc
+++ b/runtime/interpreter/interpreter_common.cc
@@ -501,6 +501,7 @@
   uint16_t num_regs;
   if (LIKELY(code_item != nullptr)) {
     num_regs = code_item->registers_size_;
+    DCHECK_EQ(string_init ? num_ins - 1 : num_ins, code_item->ins_size_);
   } else {
     DCHECK(called_method->IsNative() || called_method->IsProxyMethod());
     num_regs = num_ins;