diff --git a/LEGO1/legoomni.cpp b/LEGO1/legoomni.cpp
index 365748e7..fe71c4a3 100644
--- a/LEGO1/legoomni.cpp
+++ b/LEGO1/legoomni.cpp
@@ -182,6 +182,13 @@ MxResult LegoOmni::Create(MxOmniCreateParam &p)
   return SUCCESS;
 }
 
+#if defined(__MINGW32__)
+MxResult LegoOmni::Create(const MxOmniCreateParam &p)
+{
+  return Create((MxOmniCreateParam &)p);
+}
+#endif
+
 void LegoOmni::Destroy()
 {
   // FIXME: Stub
diff --git a/LEGO1/mxvideoparam.h b/LEGO1/mxvideoparam.h
index 3e00a920..b757e26a 100644
--- a/LEGO1/mxvideoparam.h
+++ b/LEGO1/mxvideoparam.h
@@ -18,6 +18,13 @@ class MxVideoParam
   __declspec(dllexport) MxVideoParam &operator=(const MxVideoParam &);
   __declspec(dllexport) ~MxVideoParam();
 
+#ifdef __MINGW32__
+  __declspec(dllexport) MxVideoParam(const MxRect32 &rect, MxPalette *pal, unsigned long p3, const MxVideoParamFlags &flags)
+  : MxVideoParam((MxRect32 &)rect, pal, p3, (MxVideoParamFlags &)flags)
+  {
+  }
+#endif
+
   __declspec(dllexport) void SetDeviceName(char *id);
 
   inline MxVideoParamFlags &flags() { return m_flags; }