diff --git a/NanaZip.Codecs/NanaZip.Codecs.cpp b/NanaZip.Codecs/NanaZip.Codecs.cpp
index dd029a5df..6533b9967 100644
--- a/NanaZip.Codecs/NanaZip.Codecs.cpp
+++ b/NanaZip.Codecs/NanaZip.Codecs.cpp
@@ -50,7 +50,7 @@ struct HasherFactory : public winrt::implements<
 
     HRESULT STDMETHODCALLTYPE GetHasherProp(
         _In_ UINT32 Index,
-        _In_ PROPID PropID,
+        _In_ PROPID PropId,
         _Inout_ LPPROPVARIANT Value)
     {
         if (!(Index < this->GetNumHashers()))
@@ -65,7 +65,7 @@ struct HasherFactory : public winrt::implements<
 
         ::PropVariantClear(Value);
 
-        switch (PropID)
+        switch (PropId)
         {
         case SevenZipHasherId:
         {
diff --git a/NanaZip.Specification/NanaZip.Specification.SevenZip.h b/NanaZip.Specification/NanaZip.Specification.SevenZip.h
index 9c23f59e1..24056d03b 100644
--- a/NanaZip.Specification/NanaZip.Specification.SevenZip.h
+++ b/NanaZip.Specification/NanaZip.Specification.SevenZip.h
@@ -54,7 +54,7 @@ IHashers: public IUnknown
 
     virtual HRESULT STDMETHODCALLTYPE GetHasherProp(
         _In_ UINT32 Index,
-        _In_ PROPID PropID,
+        _In_ PROPID PropId,
         _Inout_ LPPROPVARIANT Value) = 0;
 
     virtual HRESULT STDMETHODCALLTYPE CreateHasher(