diff --git a/modules/i3.c b/modules/i3.c
index 433fcf7..81e2ec8 100644
--- a/modules/i3.c
+++ b/modules/i3.c
@@ -442,7 +442,7 @@ get_socket_address(struct sockaddr_un *addr)
 #endif
     }
 
-    strncpy(addr->sun_path, sway_sock, sizeof(addr->sun_path));
+    strncpy(addr->sun_path, sway_sock, sizeof(addr->sun_path) - 1);
     return true;
 }
 
diff --git a/modules/mpd.c b/modules/mpd.c
index 6606df3..ac74854 100644
--- a/modules/mpd.c
+++ b/modules/mpd.c
@@ -216,7 +216,7 @@ wait_for_socket_create(const struct module *mod)
         int s = socket(AF_UNIX, SOCK_STREAM, 0);
 
         struct sockaddr_un addr = {.sun_family = AF_UNIX};
-        strncpy(addr.sun_path, m->host, sizeof(addr.sun_path));
+        strncpy(addr.sun_path, m->host, sizeof(addr.sun_path) - 1);
 
         int r = connect(s, (const struct sockaddr *)&addr, sizeof(addr));