cache

diff --git a/src/main/java/br/ufrgs/inf/prosoft/cache/MultiCache.java b/src/main/java/br/ufrgs/inf/prosoft/cache/MultiCache.java
index 2c77200..9dcded5 100644
--- a/src/main/java/br/ufrgs/inf/prosoft/cache/MultiCache.java
+++ b/src/main/java/br/ufrgs/inf/prosoft/cache/MultiCache.java
@@ -109,7 +109,7 @@ public class MultiCache<K, V> implements Cache<K, V> {
         try {
             return System.currentTimeMillis() <= this.keyHasTTL.get(Optional.ofNullable(key));
         } catch (NullPointerException ex) {
-            return false;
+            return true;
         }
     }