diff --git a/src/mapleall/maple_be/src/cg/aarch64/aarch64_global.cpp b/src/mapleall/maple_be/src/cg/aarch64/aarch64_global.cpp
index cb198c6b069378f831291e26dd8c42a56f72eab6..7f9df1e0935212a975eab1e6f0782b62fce100eb 100644
--- a/src/mapleall/maple_be/src/cg/aarch64/aarch64_global.cpp
+++ b/src/mapleall/maple_be/src/cg/aarch64/aarch64_global.cpp
@@ -2212,6 +2212,9 @@ bool SameRHSPropPattern::CheckCondition(Insn &insn) {
     return false;
   }
   CHECK_FATAL(prevInsn->GetOperand(kInsnFirstOpnd).IsRegister(), "prevInsn first operand must be register");
+  if (static_cast<RegOperand&>(prevInsn->GetOperand(kInsnFirstOpnd)).GetRegisterNumber() == R16) {
+    return false;
+  }
   if (prevInsn->GetOperand(kInsnSecondOpnd).IsRegister() &&
       RegOperand::IsSameReg(prevInsn->GetOperand(kInsnFirstOpnd), prevInsn->GetOperand(kInsnSecondOpnd))) {
     return false;