diff --git a/source/d3d8to9_device.cpp b/source/d3d8to9_device.cpp
index de2cf36..e4f82be 100644
--- a/source/d3d8to9_device.cpp
+++ b/source/d3d8to9_device.cpp
@@ -445,6 +445,9 @@ HRESULT STDMETHODCALLTYPE Direct3DDevice8::CopyRects(IDirect3DSurface8 *pSourceS
 	if (SourceDesc.Format != DestinationDesc.Format)
 		return D3DERR_INVALIDCALL;
 
+	if (IsDepthStencil(SourceDesc.Format))
+		return D3DERR_INVALIDCALL;
+
 	HRESULT hr = D3DERR_INVALIDCALL;
 
 	if (cRects == 0)
diff --git a/source/d3d8types.cpp b/source/d3d8types.cpp
index 7b962c0..c28b0af 100644
--- a/source/d3d8types.cpp
+++ b/source/d3d8types.cpp
@@ -15,6 +15,16 @@ bool SupportsPalettes()
 	return hasPalette;
 }
 
+bool IsDepthStencil(D3DFORMAT &Format) {
+	return Format == D3DFMT_D16_LOCKABLE
+		|| Format == D3DFMT_D16
+		|| Format == D3DFMT_D32
+		|| Format == D3DFMT_D15S1
+		|| Format == D3DFMT_D24X4S4
+		|| Format == D3DFMT_D24S8
+		|| Format == D3DFMT_D24X8;
+}
+
 static UINT CalcTextureSize(UINT Width, UINT Height, UINT Depth, D3DFORMAT Format)
 {
 	switch (static_cast<DWORD>(Format))
diff --git a/source/d3d8types.hpp b/source/d3d8types.hpp
index 6d7b07d..9a2b128 100644
--- a/source/d3d8types.hpp
+++ b/source/d3d8types.hpp
@@ -192,6 +192,7 @@ struct D3DADAPTER_IDENTIFIER8
 };
 
 bool SupportsPalettes();
+bool IsDepthStencil(D3DFORMAT &format);
 
 void ConvertCaps(D3DCAPS9 &input, D3DCAPS8 &output);
 void ConvertVolumeDesc(D3DVOLUME_DESC &input, D3DVOLUME_DESC8 &output);