diff --git a/SPD-classes/src/main/java/com/watabou/utils/SparseArray.java b/SPD-classes/src/main/java/com/watabou/utils/SparseArray.java
index 676a8f715..dcedfab9d 100644
--- a/SPD-classes/src/main/java/com/watabou/utils/SparseArray.java
+++ b/SPD-classes/src/main/java/com/watabou/utils/SparseArray.java
@@ -27,12 +27,27 @@ import java.util.Arrays;
 import java.util.List;
 
 public class SparseArray<T> extends IntMap<T> {
-
-	public int[] keyArray() {
+	
+	@Override
+	public synchronized T put(int key, T value) {
+		return super.put(key, value);
+	}
+	
+	@Override
+	public synchronized T get(int key, T defaultValue) {
+		return super.get(key, defaultValue);
+	}
+	
+	@Override
+	public synchronized T remove(int key) {
+		return super.remove(key);
+	}
+	
+	public synchronized int[] keyArray() {
 		return keys().toArray().toArray();
 	}
 	
-	public List<T> valueList() {
+	public synchronized List<T> valueList() {
 		return Arrays.asList(values().toArray().toArray());
 	}
 }