diff --git a/daemon/src/sip/sipvoiplink.h b/daemon/src/sip/sipvoiplink.h
index 0b6a3f5c2f94be528e8fd1d70c4a0ac0a7daf75a..3d237a099f8026b38f6d6fe1baa1ca0485ef79a5 100644
--- a/daemon/src/sip/sipvoiplink.h
+++ b/daemon/src/sip/sipvoiplink.h
@@ -274,8 +274,10 @@ class SIPVoIPLink : public VoIPLink {
         void clearSipCallMap();
         void addSipCall(SIPCall* call);
 
+#warning Not thread safe! The SIPCall may be deleted at any time after being returned
         SIPCall* getSipCall(const std::string& id);
         SIPCall* tryGetSipCall(const std::string& id);
+
         void removeSipCall(const std::string &id);
 
         /**