diff --git a/src/factor/factor_base.cpp b/src/factor/factor_base.cpp
index 4e29f0bf7f10105fa98d9446b2dd1370e0535275..a653807ebbaf849ab8fea0dd81c07592f197fb14 100644
--- a/src/factor/factor_base.cpp
+++ b/src/factor/factor_base.cpp
@@ -157,7 +157,7 @@ void FactorBase::link(FeatureBasePtr _ftr_ptr)
     this->setFeature(_ftr_ptr);
 
     // set problem ( and register factor )
-    WOLF_WARN_COND(this->getProblem() == nullptr, "ADDING FACTOR ", this->id(), " TO FEATURE ", _ftr_ptr->id(), " NOT CONNECTED WITH PROBLEM.");
+    WOLF_WARN_COND(_ftr_ptr->getProblem() == nullptr, "ADDING FACTOR ", this->id(), " TO FEATURE ", _ftr_ptr->id(), " THAT IS NOT CONNECTED WITH PROBLEM.");
     this->setProblem(_ftr_ptr->getProblem());
 
     // constrained by