1 files changed, 21 insertions, 0 deletions
diff --git a/e_os2.h b/e_os2.h
index f5a5fa2bfb..405b51fcec 100644
--- a/e_os2.h
+++ b/e_os2.h
@@ -283,6 +283,27 @@ extern "C" {
 # define OPENSSL_GLOBAL_REF(name) _shadow_##name
 #endif
 
+#if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) && macintosh==1 && !defined(MAC_OS_GUSI_SOURCE)
+#  define ossl_ssize_t long
+#endif
+
+#ifdef OPENSSL_SYS_MSDOS
+#  define ossl_ssize_t long
+#endif
+
+#if defined(NeXT) || defined(OPENSSL_SYS_NEWS4) || defined(OPENSSL_SYS_SUNOS)
+#  define ssize_t int
+#endif
+
+#if defined(__ultrix) && !defined(ssize_t)
+#  define ossl_ssize_t int 
+#endif
+
+#ifndef ossl_ssize_t
+#  define ossl_ssize_t ssize_t
+#endif
+
+
 #ifdef DEBUG_UNUSED
 #define __owur __attribute__((__warn_unused_result__))
 #else