diff --git a/LEGO1/omni/include/mxdsfile.h b/LEGO1/omni/include/mxdsfile.h
index 4ddfaf3c..4cf04e7f 100644
--- a/LEGO1/omni/include/mxdsfile.h
+++ b/LEGO1/omni/include/mxdsfile.h
@@ -13,6 +13,10 @@ class MxDSFile : public MxDSSource {
 public:
 	MxDSFile(const char* p_filename, MxULong p_skipReadingChunks);
 
+    enum {
+        OPEN_READ = 0,
+    };
+
 #ifdef ISLE_APP
 	~MxDSFile() override { Close(); }
 #else
diff --git a/LEGO1/omni/src/stream/mxdiskstreamprovider.cpp b/LEGO1/omni/src/stream/mxdiskstreamprovider.cpp
index 375e38d3..5b7d9da8 100644
--- a/LEGO1/omni/src/stream/mxdiskstreamprovider.cpp
+++ b/LEGO1/omni/src/stream/mxdiskstreamprovider.cpp
@@ -92,11 +92,11 @@ MxResult MxDiskStreamProvider::SetResourceToGet(MxStreamController* p_resource)
 
 	m_pFile = new MxDSFile(path.GetData(), 0);
 	if (m_pFile != NULL) {
-		if (m_pFile->Open(OF_READ) != 0) {
+		if (m_pFile->Open(MxDSFile::OPEN_READ) != 0) {
 			path = MxString(MxOmni::GetCD()) + p_resource->GetAtom().GetInternal() + ".si";
 			m_pFile->SetFileName(path.GetData());
 
-			if (m_pFile->Open(OF_READ) != 0) {
+			if (m_pFile->Open(MxDSFile::OPEN_READ) != 0) {
 				goto done;
 			}
 		}
diff --git a/LEGO1/omni/src/stream/mxramstreamprovider.cpp b/LEGO1/omni/src/stream/mxramstreamprovider.cpp
index 2b062504..28e78ffb 100644
--- a/LEGO1/omni/src/stream/mxramstreamprovider.cpp
+++ b/LEGO1/omni/src/stream/mxramstreamprovider.cpp
@@ -69,11 +69,11 @@ MxResult MxRAMStreamProvider::SetResourceToGet(MxStreamController* p_resource)
 
 	m_pFile = new MxDSFile(path.GetData(), 0);
 	if (m_pFile != NULL) {
-		if (m_pFile->Open(OF_READ) != 0) {
+		if (m_pFile->Open(MxDSFile::OPEN_READ) != 0) {
 			path = MxString(MxOmni::GetCD()) + p_resource->GetAtom().GetInternal() + ".si";
 			m_pFile->SetFileName(path.GetData());
 
-			if (m_pFile->Open(OF_READ) != 0) {
+			if (m_pFile->Open(MxDSFile::OPEN_READ) != 0) {
 				goto done;
 			}
 		}