diff --git a/src/Parser/Options.h b/src/Parser/Options.h
index 67d2ded0..a80c37a3 100644
--- a/src/Parser/Options.h
+++ b/src/Parser/Options.h
@@ -9,6 +9,13 @@
 #include <vcclr.h>
 using namespace System::Collections::Generic;
 
+public enum struct CppAbi
+{
+    Itanium,
+    Microsoft,
+    ARM
+};
+
 public ref struct ParserOptions
 {
     ParserOptions()
@@ -39,7 +46,7 @@ public ref struct ParserOptions
     bool NoStandardIncludes;
     bool NoBuiltinIncludes;
     bool MicrosoftMode;
-	CppSharp::AST::CppAbi Abi;
+    CppAbi Abi;
 
     bool Verbose;
 };
diff --git a/src/Parser/Parser.cpp b/src/Parser/Parser.cpp
index 4c7bcb78..0a481293 100644
--- a/src/Parser/Parser.cpp
+++ b/src/Parser/Parser.cpp
@@ -117,7 +117,7 @@ void Parser::SetupHeader()
     C->setInvocation(Inv);
 
     TargetOptions& TO = Inv->getTargetOpts();
-    TargetABI = (Opts->Abi == CppSharp::AST::CppAbi::Microsoft) ? TargetCXXABI::Microsoft
+    TargetABI = (Opts->Abi == CppAbi::Microsoft) ? TargetCXXABI::Microsoft
         : TargetCXXABI::GenericItanium;
     TO.CXXABI = GetCXXABIString(TargetABI);