diff --git a/LEGO1/mxbitmap.cpp b/LEGO1/mxbitmap.cpp
index 05b9d757..742c8d79 100644
--- a/LEGO1/mxbitmap.cpp
+++ b/LEGO1/mxbitmap.cpp
@@ -96,7 +96,7 @@ MxResult MxBitmap::ImportColorsToPalette(RGBQUAD* p_rgbquad, MxPalette* p_palett
 }
 
 // OFFSET: LEGO1 0x100bcaa0
-int MxBitmap::vtable1c(int p_width, int p_height, MxPalette *p_palette, int p_option)
+MxResult MxBitmap::vtable1c(int p_width, int p_height, MxPalette *p_palette, int p_option)
 {
   MxResult ret = FAILURE;
   MxLong size = ((p_width + 3) & -4) * p_height;
@@ -275,7 +275,7 @@ void MxBitmap::ImportPalette(MxPalette* p_palette)
 }
 
 // OFFSET: LEGO1 0x100bd2d0
-int MxBitmap::vtable3c(MxBool p_option)
+MxResult MxBitmap::vtable3c(MxBool p_option)
 {
   MxResult ret = FAILURE;
   MxPalette *pal = NULL;
diff --git a/LEGO1/mxbitmap.h b/LEGO1/mxbitmap.h
index 256b497e..2d276b5e 100644
--- a/LEGO1/mxbitmap.h
+++ b/LEGO1/mxbitmap.h
@@ -29,7 +29,7 @@ class MxBitmap : public MxCore
 
   virtual int vtable14(int);
   virtual MxResult vtable18(MxBITMAPINFO *p_info);
-  virtual int vtable1c(int p_width, int p_height, MxPalette *p_palette, int);
+  virtual MxResult vtable1c(int p_width, int p_height, MxPalette *p_palette, int);
   virtual MxResult LoadFile(HANDLE p_handle);
   __declspec(dllexport) virtual MxLong Read(const char *p_filename); // vtable+24
   virtual int vtable28(int);
@@ -37,7 +37,7 @@ class MxBitmap : public MxCore
   virtual void vtable30(int, int, int, int, int, int, int);
   __declspec(dllexport) virtual MxPalette *CreatePalette(); // vtable+34
   virtual void ImportPalette(MxPalette* p_palette);
-  virtual int vtable3c(MxBool);
+  virtual MxResult vtable3c(MxBool);
   virtual MxResult CopyColorData(HDC p_hdc, int p_xSrc, int p_ySrc, int p_xDest, int p_yDest, int p_destWidth, int p_destHeight); // vtable+40
 
 private: