diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index 91a0972ec117c1faefb72feca953653c40a7d80f..12f92e235a13359240559c63ec09a7476069c090 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -615,7 +615,7 @@ nfulnl_log_packet(unsigned int pf,
 
 	plen = 0;
 	if (prefix)
-		plen = strlen(prefix);
+		plen = strlen(prefix) + 1;
 
 	/* all macros expand to constant values at compile time */
 	/* FIXME: do we want to make the size calculation conditional based on