diff --git a/src/main/java/org/gcube/portal/databook/server/DBCassandraAstyanaxImpl.java b/src/main/java/org/gcube/portal/databook/server/DBCassandraAstyanaxImpl.java
index 6a9d37d..a77b452 100644
--- a/src/main/java/org/gcube/portal/databook/server/DBCassandraAstyanaxImpl.java
+++ b/src/main/java/org/gcube/portal/databook/server/DBCassandraAstyanaxImpl.java
@@ -1744,8 +1744,7 @@ public final class DBCassandraAstyanaxImpl implements DatabookStore {
 		// get the list of liked feeds
 		List<String> likedFeedsIdsByUser = getAllLikedFeedIdsByUser(userid);
 
-		if(likedFeedsIdsByUser != null){
-
+		if(likedFeedsIdsByUser != null && !likedFeedsIdsByUser.isEmpty()){
 			for(int i = likedFeedsIdsByUser.size() - 1; i >= 0; i--){
 				String feedId = likedFeedsIdsByUser.get(i);
 				try{