diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 2e6ad6dbba6c..c64072bb504b 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2453,7 +2453,7 @@ void __init tcp_init(void)
 					0,
 					&tcp_hashinfo.ehash_size,
 					NULL,
-					0);
+					thash_entries ? 0 : 512 * 1024);
 	tcp_hashinfo.ehash_size = 1 << tcp_hashinfo.ehash_size;
 	for (i = 0; i < tcp_hashinfo.ehash_size; i++) {
 		rwlock_init(&tcp_hashinfo.ehash[i].lock);