diff --git a/PC/config.h b/PC/config.h
index 915b1c2d8ae..729981985f5 100644
--- a/PC/config.h
+++ b/PC/config.h
@@ -308,6 +308,9 @@ typedef int pid_t;
 /* Define to `unsigned' if <sys/types.h> doesn't define.  */
 /* #undef size_t */
 
+/* Define to `int' if <sys/types.h> doesn't define.  */
+#define socklen_t int
+
 /* Define if you have the ANSI C header files.  */
 #define STDC_HEADERS 1