diff --git a/src/path.c b/src/path.c
index f51bee7..9cbc7a7 100644
--- a/src/path.c
+++ b/src/path.c
@@ -403,8 +403,8 @@
     if (pref) {
         *mod = ly_resolve_prefix(ctx, pref, len, format, prefix_data);
         if (!*mod) {
-            LOGVAL_P(ctx, cur_node, LYVE_XPATH, "No module connected with the prefix \"%.*s\" found (prefix format %d).",
-                    len, pref, format);
+            LOGVAL_P(ctx, cur_node, LYVE_XPATH, "No module connected with the prefix \"%.*s\" found (prefix format %s).",
+                    len, pref, ly_format2str(format));
             return LY_EVALID;
         } else if (!(*mod)->implemented) {
             if (lref == LY_PATH_LREF_FALSE) {