diff --git a/src/archutils/Win32/arch_setup.h b/src/archutils/Win32/arch_setup.h
index f2aa78e508..0d6f018ab1 100644
--- a/src/archutils/Win32/arch_setup.h
+++ b/src/archutils/Win32/arch_setup.h
@@ -161,7 +161,10 @@ inline long int lrintf( float f )
 #define CRASH_HANDLER
 #endif
 
+// autoconf does this for us
+#if !defined(__MINGW32__)
 #define ENDIAN_LITTLE
+#endif
 
 #define OGG_LIB_DIR "../extern/vorbis/win32/"
 
diff --git a/src/libtomcrypt/src/prngs/rng_get_bytes.c b/src/libtomcrypt/src/prngs/rng_get_bytes.c
index ee10e14383..5923205c1e 100644
--- a/src/libtomcrypt/src/prngs/rng_get_bytes.c
+++ b/src/libtomcrypt/src/prngs/rng_get_bytes.c
@@ -88,7 +88,10 @@ static unsigned long rng_ansic(unsigned char *buf, unsigned long len,
 
 /* Try the Microsoft CSP */
 #if defined(WIN32) || defined(WINCE)
+// XXX This probably shouldn't be hardcoded at all but I don't want to break anything
+#if !defined(__MINGW32__)
 #define _WIN32_WINNT 0x0400
+#endif
 #ifdef WINCE
    #define UNDER_CE
    #define ARM