--- gnucash-5.6/gnucash/import-export/import-main-matcher.cpp~	2024-03-29 20:42:22.000000000 +0000
+++ gnucash-5.6/gnucash/import-export/import-main-matcher.cpp	2024-04-05 18:41:04.116775306 +0000
@@ -847,7 +847,7 @@
     bool is_selection = true;
     auto debugging_enabled{qof_log_check (G_LOG_DOMAIN, QOF_LOG_DEBUG)};
 
-    DEBUG("Rows in selection = %ld", selected_refs.size());
+    DEBUG("Rows in selection = %zu", selected_refs.size());
 
     for (const auto& ref : selected_refs)
     {