diff --git a/include/support/win32/locale_win32.h b/include/support/win32/locale_win32.h
index e768af50c..f728d2344 100644
--- a/include/support/win32/locale_win32.h
+++ b/include/support/win32/locale_win32.h
@@ -103,9 +103,9 @@ isupper_l(int c, _locale_t loc)
 #define sscanf_l( __s, __l, __f, ...) _sscanf_l( __s, __f, __l, __VA_ARGS__ )
 #define vsscanf_l( __s, __l, __f, ...) _sscanf_l( __s, __f, __l, __VA_ARGS__ )
 #define sprintf_l( __s, __l, __f, ... ) _sprintf_l( __s, __f, __l, __VA_ARGS__ )
-#define snprintf_l( __s, __n, __l, __f, ... ) _snprintf_l( __s, __n, __f, __l, __VA_ARGS__ )
 #define vsprintf_l( __s, __l, __f, ... ) _vsprintf_l( __s, __f, __l, __VA_ARGS__ )
 #define vsnprintf_l( __s, __n, __l, __f, ... ) _vsnprintf_l( __s, __n, __f, __l, __VA_ARGS__ )
+int snprintf_l(char *ret, size_t n, locale_t loc, const char *format, ...);
 int asprintf_l( char **ret, locale_t loc, const char *format, ... );
 int vasprintf_l( char **ret, locale_t loc, const char *format, va_list ap );
 
diff --git a/src/support/win32/locale_win32.cpp b/src/support/win32/locale_win32.cpp
index 1729d84a3..5a4374347 100644
--- a/src/support/win32/locale_win32.cpp
+++ b/src/support/win32/locale_win32.cpp
@@ -80,6 +80,16 @@ int wctob_l( wint_t c, locale_t loc )
     return wctob( c );
 }
 
+int snprintf_l(char *ret, size_t n, locale_t loc, const char *format, ...)
+{
+    __locale_raii __current( uselocale(loc), uselocale );
+    va_list ap;
+    va_start( ap, format );
+    int result = vsnprintf( ret, n, format, ap );
+    va_end(ap);
+    return result;
+}
+
 int asprintf_l( char **ret, locale_t loc, const char *format, ... )
 {
     va_list ap;