diff --git a/smart-connector/src/main/java/eu/knowledge/engine/smartconnector/util/KnowledgeBaseImpl.java b/smart-connector/src/main/java/eu/knowledge/engine/smartconnector/util/KnowledgeBaseImpl.java
index e4582322..50ba581e 100644
--- a/smart-connector/src/main/java/eu/knowledge/engine/smartconnector/util/KnowledgeBaseImpl.java
+++ b/smart-connector/src/main/java/eu/knowledge/engine/smartconnector/util/KnowledgeBaseImpl.java
@@ -567,7 +567,8 @@ public synchronized void syncKIs() {
 		}
 		this.unregisteredReactKIs.clear();
 
-		this.getSC().setDomainKnowledge(this.domainKnowledge);
+		if (!this.domainKnowledge.isEmpty())
+			this.getSC().setDomainKnowledge(this.domainKnowledge);
 		this.getSC().setReasonerLevel(this.reasonerLevel);
 
 	}