diff --git a/src/mapleall/maple_ir/src/mir_nodes.cpp b/src/mapleall/maple_ir/src/mir_nodes.cpp
index 0b37643e0a5dcc83bc556501935b54a63c929e85..579be730c512eade6e24205a632dca170bc90469 100644
--- a/src/mapleall/maple_ir/src/mir_nodes.cpp
+++ b/src/mapleall/maple_ir/src/mir_nodes.cpp
@@ -2520,7 +2520,8 @@ bool ConstvalNode::IsSameContent(const BaseNode *node) const {
   }
   if (constVal->GetKind() == kConstInt) {
     // integer may differ in primtype, and they may be different MIRIntConst Node
-    return static_cast<MIRIntConst*>(constVal)->GetValue() == static_cast<const MIRIntConst*>(mirConst)->GetValue();
+    return static_cast<MIRIntConst *>(constVal)->GetExtValue() ==
+           static_cast<const MIRIntConst *>(mirConst)->GetExtValue();
   } else {
     return false;
   }