diff --git a/src/main/java/net/sf/jabref/model/database/BibDatabase.java b/src/main/java/net/sf/jabref/model/database/BibDatabase.java
index 9f25a9ec7da..ecb927b4885 100644
--- a/src/main/java/net/sf/jabref/model/database/BibDatabase.java
+++ b/src/main/java/net/sf/jabref/model/database/BibDatabase.java
@@ -99,7 +99,7 @@ public synchronized EntrySorter getSorter(Comparator<BibEntry> comp) {
      * Returns whether an entry with the given ID exists (-> entry_type + hashcode).
      */
     public boolean containsEntryWithId(String id) {
-        return entries.stream().anyMatch(entry -> entry.getId().equals(id));
+        return allKeys.containsKey(id);
     }
 
     public List<BibEntry> getEntries() {