2 files changed, 7 insertions, 0 deletions
diff --git a/core/project_settings.cpp b/core/project_settings.cpp
index e08a44d0c1..960a0ec1b0 100644
--- a/core/project_settings.cpp
+++ b/core/project_settings.cpp
@@ -659,6 +659,12 @@ void ProjectSettings::set_builtin_order(const String &p_name) {
 	}
 }
 
+bool ProjectSettings::is_builtin_setting(const String &p_name) const {
+	// Return true because a false negative is worse than a false positive.
+	ERR_FAIL_COND_V_MSG(!props.has(p_name), true, "Request for nonexistent project setting: " + p_name + ".");
+	return props[p_name].order < NO_BUILTIN_ORDER_BASE;
+}
+
 void ProjectSettings::clear(const String &p_name) {
 	ERR_FAIL_COND_MSG(!props.has(p_name), "Request for nonexistent project setting: " + p_name + ".");
 	props.erase(p_name);
diff --git a/core/project_settings.h b/core/project_settings.h
index 659ee402b3..686f6f3873 100644
--- a/core/project_settings.h
+++ b/core/project_settings.h
@@ -142,6 +142,7 @@ public:
 	int get_order(const String &p_name) const;
 	void set_order(const String &p_name, int p_order);
 	void set_builtin_order(const String &p_name);
+	bool is_builtin_setting(const String &p_name) const;
 
 	Error setup(const String &p_path, const String &p_main_pack, bool p_upwards = false);