diff --git a/leenkx/Sources/iron/system/Time.hx b/leenkx/Sources/iron/system/Time.hx
index c82d8020..7b6cd221 100644
--- a/leenkx/Sources/iron/system/Time.hx
+++ b/leenkx/Sources/iron/system/Time.hx
@@ -7,7 +7,13 @@ class Time {
 		if (frequency == null) initFrequency();
 		return 1 / frequency;
 	}
-
+	
+	// TODO: set physics step from Blender's editor
+	public static var fixedStep(get, never): Float;
+	static function get_fixedStep(): Float {
+		return 1 / 60;
+	}
+	
 	public static var scale = 1.0;
 	public static var delta(get, never): Float;
 	static function get_delta(): Float {