diff --git a/LEGO1/mxbitmap.cpp b/LEGO1/mxbitmap.cpp
index c812a0f0..2ccdd80b 100644
--- a/LEGO1/mxbitmap.cpp
+++ b/LEGO1/mxbitmap.cpp
@@ -47,11 +47,11 @@ MxResult MxBitmap::LoadFile(HANDLE p_handle)
 }
 
 // OFFSET: LEGO1 0x100bcd10
-long MxBitmap::Read(const char *filename)
+long MxBitmap::Read(const char *p_filename)
 {
   MxResult result = FAILURE;
   HANDLE handle = CreateFileA(
-    filename,
+    p_filename,
     GENERIC_READ,
     FILE_SHARE_READ,
     NULL,
diff --git a/LEGO1/mxbitmap.h b/LEGO1/mxbitmap.h
index d503c6c3..e16fcb0e 100644
--- a/LEGO1/mxbitmap.h
+++ b/LEGO1/mxbitmap.h
@@ -17,7 +17,7 @@ class MxBitmap : public MxCore
   virtual int vtable18(BITMAPINFOHEADER *p_bmiHeader);
   virtual int vtable1c(int p_width, int p_height, MxPalette *p_palette, int);
   virtual MxResult LoadFile(HANDLE p_handle);
-  __declspec(dllexport) virtual long Read(const char *); // vtable+24
+  __declspec(dllexport) virtual long Read(const char *p_filename); // vtable+24
   virtual int vtable28(int);
   virtual void vtable2c(int, int, int, int, int, int, int);
   virtual void vtable30(int, int, int, int, int, int, int);