diff --git a/src/tnlp.hh b/src/tnlp.hh
index 72be185..f42b671 100644
--- a/src/tnlp.hh
+++ b/src/tnlp.hh
@@ -136,9 +136,6 @@ namespace roboptim
 			    Number obj_factor,
 			    const Number* lambda);
 
-    /// \brief Pointer to function logger (see log4cxx documentation).
-    static log4cxx::LoggerPtr logger;
-
     private:
       /// \brief Non-linear function type.
       ///
diff --git a/src/tnlp.hxx b/src/tnlp.hxx
index 38ed707..5446d2c 100644
--- a/src/tnlp.hxx
+++ b/src/tnlp.hxx
@@ -41,10 +41,6 @@ namespace roboptim
 
   namespace detail
   {
-    template <typename T>
-    log4cxx::LoggerPtr Tnlp<T>::logger
-    (log4cxx::Logger::getLogger ("roboptim.ipopt"));
-
     /// \internal
 #ifdef ROBOPTIM_CORE_IPOPT_PLUGIN_CHECK_GRADIENT
     template <typename T, typename F>
diff --git a/tests/shared-tests b/tests/shared-tests
index 37d1bac..bc512d2 160000
--- a/tests/shared-tests
+++ b/tests/shared-tests
@@ -1 +1 @@
-Subproject commit 37d1bac588c7a9e265c27b98aaa041e95e8556b1
+Subproject commit bc512d24ceccfd43f0834016e97a6bf6972ae734