diff --git a/include/dxc/Support/HLSLOptions.h b/include/dxc/Support/HLSLOptions.h
index c5e52e5680..41f6b2c63b 100644
--- a/include/dxc/Support/HLSLOptions.h
+++ b/include/dxc/Support/HLSLOptions.h
@@ -229,16 +229,16 @@ class DxcOpts {
 
   std::vector<std::string> Warnings;
 
-  bool IsRootSignatureProfile();
-  bool IsLibraryProfile();
+  bool IsRootSignatureProfile() const;
+  bool IsLibraryProfile() const;
 
   // Helpers to clarify interpretation of flags for behavior in implementation
-  bool GenerateFullDebugInfo(); // Zi
-  bool GeneratePDB();           // Zi or Zs
-  bool EmbedDebugInfo();        // Qembed_debug
-  bool EmbedPDBName();          // Zi or Fd
-  bool DebugFileIsDirectory();  // Fd ends in '\\'
-  llvm::StringRef GetPDBName(); // Fd name
+  bool GenerateFullDebugInfo() const; // Zi
+  bool GeneratePDB() const;           // Zi or Zs
+  bool EmbedDebugInfo() const;        // Qembed_debug
+  bool EmbedPDBName() const;          // Zi or Fd
+  bool DebugFileIsDirectory() const;  // Fd ends in '\\'
+  llvm::StringRef GetPDBName() const; // Fd name
 
   // SPIRV Change Starts
 #ifdef ENABLE_SPIRV_CODEGEN
diff --git a/lib/DxcSupport/HLSLOptions.cpp b/lib/DxcSupport/HLSLOptions.cpp
index 717bb15b64..a76a788a4d 100644
--- a/lib/DxcSupport/HLSLOptions.cpp
+++ b/lib/DxcSupport/HLSLOptions.cpp
@@ -130,36 +130,36 @@ void DxcDefines::BuildDefines() {
   }
 }
 
-bool DxcOpts::IsRootSignatureProfile() {
+bool DxcOpts::IsRootSignatureProfile() const {
   return TargetProfile == "rootsig_1_0" ||
       TargetProfile == "rootsig_1_1";
 }
 
-bool DxcOpts::IsLibraryProfile() {
+bool DxcOpts::IsLibraryProfile() const {
   return TargetProfile.startswith("lib_");
 }
 
-bool DxcOpts::GenerateFullDebugInfo() {
+bool DxcOpts::GenerateFullDebugInfo() const {
   return DebugInfo;
 }
 
-bool DxcOpts::GeneratePDB() {
+bool DxcOpts::GeneratePDB() const {
   return DebugInfo || SourceOnlyDebug;
 }
 
-bool DxcOpts::EmbedDebugInfo() {
+bool DxcOpts::EmbedDebugInfo() const {
   return EmbedDebug;
 }
 
-bool DxcOpts::EmbedPDBName() {
+bool DxcOpts::EmbedPDBName() const {
   return GeneratePDB() || !DebugFile.empty();
 }
 
-bool DxcOpts::DebugFileIsDirectory() {
+bool DxcOpts::DebugFileIsDirectory() const {
   return !DebugFile.empty() && llvm::sys::path::is_separator(DebugFile[DebugFile.size() - 1]);
 }
 
-llvm::StringRef DxcOpts::GetPDBName() {
+llvm::StringRef DxcOpts::GetPDBName() const {
   if (!DebugFileIsDirectory())
     return DebugFile;
   return llvm::StringRef();