diff --git a/dlls/d3dx9_36/xfile.c b/dlls/d3dx9_36/xfile.c
index 157545482bf..649ea9672da 100644
--- a/dlls/d3dx9_36/xfile.c
+++ b/dlls/d3dx9_36/xfile.c
@@ -588,7 +588,7 @@ static HRESULT WINAPI d3dx9_file_CreateEnumObject(ID3DXFile *iface, const void *
     {
         D3DXF_FILELOADMEMORY *memory = (D3DXF_FILELOADMEMORY*)source;
 
-        dxfile_memory.lpMemory = memory->lpMemory;
+        dxfile_memory.lpMemory = (void *)memory->lpMemory;
         dxfile_memory.dSize = memory->dSize;
         dxfile_source = &dxfile_memory;
         dxfile_options = DXFILELOAD_FROMMEMORY;
diff --git a/include/d3dx9xof.h b/include/d3dx9xof.h
index 35019f26d4e..227f3a57ba2 100644
--- a/include/d3dx9xof.h
+++ b/include/d3dx9xof.h
@@ -49,7 +49,7 @@ typedef struct _D3DXF_FILELOADRESOURCE
 
 typedef struct _D3DXF_FILELOADMEMORY
 {
-    void *lpMemory;
+    const void *lpMemory;
     SIZE_T dSize;
 } D3DXF_FILELOADMEMORY;