diff --git a/modules/gdscript/gdscript_vm.cpp b/modules/gdscript/gdscript_vm.cpp
index 6b8b0b6c2a..b470b15872 100644
--- a/modules/gdscript/gdscript_vm.cpp
+++ b/modules/gdscript/gdscript_vm.cpp
@@ -3813,7 +3813,10 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
 				int globalname_idx = _code_ptr[ip + 2];
 				GD_ERR_BREAK(globalname_idx < 0 || globalname_idx >= _global_names_count);
 				const StringName *globalname = &_global_names_ptr[globalname_idx];
-				GD_ERR_BREAK(!GDScriptLanguage::get_singleton()->get_named_globals_map().has(*globalname));
+				if (unlikely(!GDScriptLanguage::get_singleton()->get_named_globals_map().has(*globalname))) {
+					err_text = vformat(R"(Trying to access non-existent autoload singleton "%s".)", *globalname);
+					OPCODE_BREAK;
+				}
 
 				GET_VARIANT_PTR(dst, 0);
 				*dst = GDScriptLanguage::get_singleton()->get_named_globals_map()[*globalname];