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-rw-r--r--ext/sockets/multicast.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/sockets/multicast.c b/ext/sockets/multicast.c
index 40335a186e..4e5d399a87 100644
--- a/ext/sockets/multicast.c
+++ b/ext/sockets/multicast.c
@@ -627,7 +627,7 @@ static int _php_source_op_to_ipv4_op(enum source_op sop)
#endif /* HAS_MCAST_EXT */
-#if PHP_WIN32
+#ifdef PHP_WIN32
int php_if_index_to_addr4(unsigned if_index, php_socket *php_sock, struct in_addr *out_addr)
{
MIB_IPADDRTABLE *addr_table;