diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index 4c5dc9b5480..2c4f5f8f712 100644
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,3 +1,8 @@
+2005-10-21  Francois-Xavier Coudert  <coudert@clipper.ens.fr>
+
+	PR libfortran/24383
+	* io/unix.c: Add fallback definition for SSIZE_MAX.
+
 2005-10-19  Francois-Xavier Coudert  <coudert@clipper.ens.fr>
 
 	* c99_protos.h: Define preprocessor HAVE_ macros with value 1
diff --git a/libgfortran/io/unix.c b/libgfortran/io/unix.c
index ea03515f468..91a7a474d07 100644
--- a/libgfortran/io/unix.c
+++ b/libgfortran/io/unix.c
@@ -46,6 +46,10 @@ Boston, MA 02110-1301, USA.  */
 #include "libgfortran.h"
 #include "io.h"
 
+#ifndef SSIZE_MAX
+#define SSIZE_MAX SHRT_MAX
+#endif
+
 #ifndef PATH_MAX
 #define PATH_MAX 1024
 #endif