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Diffstat (limited to 'ext/socket/socket.c')
-rw-r--r--ext/socket/socket.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/socket/socket.c b/ext/socket/socket.c
index a0c9618ce4..43bff85737 100644
--- a/ext/socket/socket.c
+++ b/ext/socket/socket.c
@@ -1759,7 +1759,7 @@ socket_s_ip_address_list(VALUE self)
#elif defined(SIOCGIFCONF)
int fd = -1;
int ret;
-#define EXTRA_SPACE (sizeof(struct ifconf) + sizeof(union_sockaddr))
+#define EXTRA_SPACE ((int)(sizeof(struct ifconf) + sizeof(union_sockaddr)))
char initbuf[4096+EXTRA_SPACE];
char *buf = initbuf;
int bufsize;