diff --git a/src/user/user_init.c b/src/user/user_init.c
index 9a7274e8..a05258fd 100644
--- a/src/user/user_init.c
+++ b/src/user/user_init.c
@@ -272,7 +272,7 @@ void mjs_defaultTexture(mjsTexture* texture) {
   texture->gridsize[0] = texture->gridsize[1] = 1;
   texture->nchannel = 3;
   char defaultlayout[sizeof(texture->gridlayout)] = "............";
-  strncpy(texture->gridlayout, defaultlayout, sizeof(texture->gridlayout));
+  memcpy(texture->gridlayout, defaultlayout, sizeof(texture->gridlayout));
 }