diff --git a/source/lib/sysdep/win/wdbg.cpp b/source/lib/sysdep/win/wdbg.cpp
index 281703858a..170fda91db 100755
--- a/source/lib/sysdep/win/wdbg.cpp
+++ b/source/lib/sysdep/win/wdbg.cpp
@@ -30,6 +30,69 @@
 #include "wdbg.h"
 #include "assert_dlg.h"
 
+
+
+
+
+
+
+void win_debug_break()
+{
+	DebugBreak();
+}
+
+
+
+// need to shoehorn printf-style variable params into
+// the OutputDebugString call.
+// - don't want to split into multiple calls - would add newlines to output.
+// - fixing Win32 _vsnprintf to return # characters that would be written,
+//   as required by C99, looks difficult and unnecessary. if any other code
+//   needs that, implement GNU vasprintf.
+// - fixed size buffers aren't nice, but much simpler than vasprintf-style
+//   allocate+expand_until_it_fits. these calls are for quick debug output,
+//   not loads of data, anyway.
+
+
+static const int MAX_CNT = 512;
+// max output size of 1 call of (w)debug_out (including \0)
+
+
+
+void debug_out(const char* fmt, ...)
+{
+	char buf[MAX_CNT];
+	buf[MAX_CNT-1] = '\0';
+
+	va_list ap;
+	va_start(ap, fmt);
+	vsnprintf(buf, MAX_CNT-1, fmt, ap);
+	va_end(ap);
+
+	OutputDebugString(buf);
+}
+
+
+void wdebug_out(const wchar_t* fmt, ...)
+{
+	wchar_t buf[MAX_CNT];
+	buf[MAX_CNT-1] = L'\0';
+
+	va_list ap;
+	va_start(ap, fmt);
+	vsnwprintf(buf, MAX_CNT-1, fmt, ap);
+	va_end(ap);
+
+	OutputDebugStringW(buf);
+}
+
+
+
+
+
+
+
+
 /*
  * voodoo programming. PDB debug info is a poorly documented mess.
  * see http://msdn.microsoft.com/msdnmag/issues/02/03/hood/default.aspx