diff --git a/HeatUp/src/de/heatup/ui/KeyBindings.java b/HeatUp/src/de/heatup/ui/KeyBindings.java
index 03a0db6..b71b30d 100644
--- a/HeatUp/src/de/heatup/ui/KeyBindings.java
+++ b/HeatUp/src/de/heatup/ui/KeyBindings.java
@@ -27,7 +27,7 @@ public class KeyBindings {
 		GameInterface.getGamePanel().addKeyListener(kl);
 	}
 	
-	private void step(final char d, final int i) {
+	private synchronized void step(final char d, final int i) {
 		final Player playerX = Query.getPlayer();
 		final int stepx = 25;
 		final int stepy = 25;