diff --git a/src/Accelerators/NNPA/Compiler/NNPACompilerOptions.cpp b/src/Accelerators/NNPA/Compiler/NNPACompilerOptions.cpp
index 0c28a7a79f..3312eb396b 100644
--- a/src/Accelerators/NNPA/Compiler/NNPACompilerOptions.cpp
+++ b/src/Accelerators/NNPA/Compiler/NNPACompilerOptions.cpp
@@ -132,11 +132,10 @@ llvm::cl::list<std::string, std::vector<std::string>> nnpaQuantOpTypesOpt(
     "nnpa-quant-op-types",
     llvm::cl::desc(
         "A comma-separated list of types of operations that are quantized. "
-        "E.g. 'MatMul,Conv'. Strings for types are the same as ONNX "
-        "operator "
-        "names in https://onnx.ai/onnx/operators/. By default or with "
-        "specifying this option, the compiler will determine the operation "
-        "types by itself."),
+        "E.g. 'MatMul,Conv'. Strings for types are the same as ONNX operator "
+        "names in https://onnx.ai/onnx/operators/. Currently, only MatMul is "
+        "supported. Without specifying this option, the compiler will "
+        "determine the operation types by itself."),
     llvm::cl::location(nnpaQuantOpTypes), llvm::cl::ValueOptional,
     llvm::cl::CommaSeparated, llvm::cl::cat(OnnxMlirCommonOptions));
 
diff --git a/src/Accelerators/NNPA/Conversion/ONNXToZHigh/ONNXToZHighCommon.cpp b/src/Accelerators/NNPA/Conversion/ONNXToZHigh/ONNXToZHighCommon.cpp
index ce69ea1658..fcceae76aa 100644
--- a/src/Accelerators/NNPA/Conversion/ONNXToZHigh/ONNXToZHighCommon.cpp
+++ b/src/Accelerators/NNPA/Conversion/ONNXToZHigh/ONNXToZHighCommon.cpp
@@ -114,7 +114,7 @@ std::vector<std::string> ONNXToZHighLoweringConfiguration::Quant::opTypes = {};
 
 void configureONNXToZHighLoweringPass(bool optReportNNPAUnsupportedOps,
     bool isDynQuant, bool quantIsActivationSym, bool quantIsWeightSym,
-    ArrayRef<std::string> quantOpTypes) {
+    std::vector<std::string> quantOpTypes) {
   ONNXToZHighLoweringConfiguration::optReportNNPAUnsupportedOps =
       optReportNNPAUnsupportedOps;
   ONNXToZHighLoweringConfiguration::isDynQuant = isDynQuant;
diff --git a/src/Accelerators/NNPA/Pass/NNPAPasses.hpp b/src/Accelerators/NNPA/Pass/NNPAPasses.hpp
index c23fb7f158..92d9691595 100644
--- a/src/Accelerators/NNPA/Pass/NNPAPasses.hpp
+++ b/src/Accelerators/NNPA/Pass/NNPAPasses.hpp
@@ -32,7 +32,7 @@ std::unique_ptr<mlir::Pass> createDevicePlacementPass(
 std::unique_ptr<mlir::Pass> createONNXToZHighPass();
 void configureONNXToZHighLoweringPass(bool reportOnNNPAUnsupportedOps,
     bool isDynQuant, bool quantIsActivationSym, bool quantIsWeightSym,
-    llvm::ArrayRef<std::string> quantOpTypes);
+    std::vector<std::string> quantOpTypes);
 
 /// Add pass for rewriting ONNX ops for ZHigh.
 std::unique_ptr<mlir::Pass> createRewriteONNXForZHighPass();