--- a/include/re_types.h
+++ b/include/re_types.h
@@ -47,7 +47,7 @@ typedef unsigned long long int    uint64
 #endif /* __BIT_TYPES_DEFINED__ */
 
 #endif /* __int8_t_defined */
-#ifndef __ssize_t_defined
+#if !defined(__ssize_t_defined) && !defined(__DEFINED_ssize_t)
 typedef long     ssize_t;
 #define __ssize_t_defined
 #endif