1 files changed, 1 insertions, 1 deletions

diff --git a/sway/ipc-server.c b/sway/ipc-server.c
index 045802e1..39d1d0a7 100644
--- a/sway/ipc-server.c
+++ b/sway/ipc-server.c
@@ -64,7 +64,7 @@ void ipc_init(struct sway_server *server) {
 
         // We want to use socket name set by user, not existing socket from another sway instance.
         if (getenv("SWAYSOCK") != NULL && access(getenv("SWAYSOCK"), F_OK) == -1) {
-                strncpy(ipc_sockaddr->sun_path, getenv("SWAYSOCK"), sizeof(ipc_sockaddr->sun_path));
+                strncpy(ipc_sockaddr->sun_path, getenv("SWAYSOCK"), sizeof(ipc_sockaddr->sun_path) - 1);
                 ipc_sockaddr->sun_path[sizeof(ipc_sockaddr->sun_path) - 1] = 0;
         }