diff --git a/lib/rpc/rpc.c b/lib/rpc/rpc.c
index 4890b66ad..985d40f46 100644
--- a/lib/rpc/rpc.c
+++ b/lib/rpc/rpc.c
@@ -45,7 +45,7 @@
 #define RPC_DEFAULT_PORT	"5260"
 
 static struct sockaddr_un g_rpc_listen_addr_unix = {};
-static char g_rpc_lock_path[sizeof(g_rpc_listen_addr_unix.sun_path) + sizeof(".lock") + 1];
+static char g_rpc_lock_path[sizeof(g_rpc_listen_addr_unix.sun_path) + sizeof(".lock")];
 static int g_rpc_lock_fd = -1;
 
 static struct spdk_jsonrpc_server *g_jsonrpc_server = NULL;