diff --git a/mlir/lib/Target/SPIRV/Serialization/Serializer.cpp b/mlir/lib/Target/SPIRV/Serialization/Serializer.cpp
--- a/mlir/lib/Target/SPIRV/Serialization/Serializer.cpp
+++ b/mlir/lib/Target/SPIRV/Serialization/Serializer.cpp
@@ -846,8 +846,7 @@
   auto resultID = getNextID();
   APInt value = intAttr.getValue();
   unsigned bitwidth = value.getBitWidth();
-  bool isSigned = value.isSignedIntN(bitwidth);
-
+  bool isSigned = intAttr.getType().isSignedInteger();
   auto opcode =
       isSpec ? spirv::Opcode::OpSpecConstant : spirv::Opcode::OpConstant;