3 files changed, 3 insertions, 3 deletions
diff --git a/ext/socket/init.c b/ext/socket/init.c
index bcc1e52d50..c3f33964a8 100644
--- a/ext/socket/init.c
+++ b/ext/socket/init.c
@@ -594,7 +594,7 @@ rsock_getfamily(int sockfd)
 }
 
 void
-rsock_init_socket_init()
+rsock_init_socket_init(void)
 {
     /*
      * SocketError is the error class for socket.
diff --git a/ext/socket/raddrinfo.c b/ext/socket/raddrinfo.c
index 8e6434717a..1d2b9f953e 100644
--- a/ext/socket/raddrinfo.c
+++ b/ext/socket/raddrinfo.c
@@ -716,7 +716,7 @@ get_addrinfo(VALUE self)
 
 
 static rb_addrinfo_t *
-alloc_addrinfo()
+alloc_addrinfo(void)
 {
     rb_addrinfo_t *rai = ZALLOC(rb_addrinfo_t);
     rai->inspectname = Qnil;
diff --git a/ext/socket/socket.c b/ext/socket/socket.c
index f27383d61c..81028c5afb 100644
--- a/ext/socket/socket.c
+++ b/ext/socket/socket.c
@@ -2025,7 +2025,7 @@ socket_s_ip_address_list(VALUE self)
 #endif
 
 void
-Init_socket()
+Init_socket(void)
 {
     rsock_init_basicsocket();