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-rw-r--r--ext/sockets/multicast.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/ext/sockets/multicast.h b/ext/sockets/multicast.h
index 3614306bbb..81a1bca799 100644
--- a/ext/sockets/multicast.h
+++ b/ext/sockets/multicast.h
@@ -65,6 +65,8 @@ int php_add4_to_if_index(
php_socket *php_sock,
unsigned *if_index TSRMLS_DC);
+int php_string_to_if_index(const char *val, unsigned *out TSRMLS_DC);
+
int php_mcast_join(
php_socket *sock,
int level,