diff --git a/src/tox-weechat-identities.c b/src/tox-weechat-identities.c
index 8ee54b1..5a30d3a 100644
--- a/src/tox-weechat-identities.c
+++ b/src/tox-weechat-identities.c
@@ -101,7 +101,7 @@ tox_weechat_save_identity_data_file(struct t_tox_weechat_identity *identity)
     char *full_path = tox_weechat_identity_data_file_path(identity);
 
     char *rightmost_slash = strrchr(full_path, '/');
-    char *save_dir = strndup(full_path, rightmost_slash - full_path);
+    char *save_dir = weechat_strndup(full_path, rightmost_slash - full_path);
     weechat_mkdir_parents(save_dir, 0755);
     free(save_dir);