diff --git a/lib/adaptive_dfe_impl.cc b/lib/adaptive_dfe_impl.cc
index e176132..e08432d 100644
--- a/lib/adaptive_dfe_impl.cc
+++ b/lib/adaptive_dfe_impl.cc
@@ -208,9 +208,9 @@ adaptive_dfe_impl::general_work(int noutput_items,
 #endif
         }
         assert(i+_nF < nin && i-1-_nB >= 0);
-        out_symb[nout] = filter(&_rotated_samples.front() + i - _nB,
-                                &_rotated_samples.front() + i + _nF+1);
-        std::memcpy(&out_taps[(_nB+_nF+1)*nout], &_taps_samples.front(), (_nB+_nF+1)*sizeof(gr_complex));
+        out_symb[nout] = filter(_rotated_samples.data() + i - _nB,
+                                _rotated_samples.data() + i + _nF+1);
+        std::memcpy(&out_taps[(_nB+_nF+1)*nout], _taps_samples.data(), (_nB+_nF+1)*sizeof(gr_complex));
         ++nout;
       } // next sample
       consume(0, ninput_processed);
@@ -254,7 +254,7 @@ gr_complex adaptive_dfe_impl::filter(gr_complex const* start, gr_complex const*
   // (1a) taps_samples
   volk_32fc_x2_dot_prod_32fc(&filter_output,
                              start,
-                             &_taps_samples.front(),
+                             _taps_samples.data(),
                              _nB+_nF+1);
   // (1b) taps_symbols
   gr_complex dot_symbols(0);
diff --git a/lib/filter_update.hpp b/lib/filter_update.hpp
index 3433597..d728ac8 100644
--- a/lib/filter_update.hpp
+++ b/lib/filter_update.hpp
@@ -16,6 +16,7 @@ namespace digitalhf {
 class filter_update : private boost::noncopyable {
 public:
   typedef std::unique_ptr<filter_update> sptr;
+  virtual ~filter_update() {}
 
   virtual void reset() = 0;
   virtual gr_complex const* update(gr_complex const*, gr_complex const*) = 0;
diff --git a/lib/lms.cc b/lib/lms.cc
index e027816..814d60d 100644
--- a/lib/lms.cc
+++ b/lib/lms.cc
@@ -40,7 +40,7 @@ gr_complex const* lms::update(gr_complex const* beg,
   volk_32fc_conjugate_32fc(&_tmp[0], beg, n);
   volk_32f_s32f_multiply_32f((float*)&_gain[0], (float const*)&_tmp[0], _mu, 2*n);
 
-  return &_gain.front();
+  return _gain.data();
 }
 
 void lms::set_parameters(std::map<std::string, float>const & p) {
diff --git a/lib/nlms.cc b/lib/nlms.cc
index 1e13a93..da98230 100644
--- a/lib/nlms.cc
+++ b/lib/nlms.cc
@@ -46,7 +46,7 @@ gr_complex const* nlms::update(gr_complex const* beg,
   volk_32f_accumulator_s32f(&norm, &_t1[0], n);
   volk_32f_s32f_multiply_32f((float*)&_gain[0], (float const*)&_tmp[0], std::max(0.005f, _mu/norm), 2*n);
 
-  return &_gain.front();
+  return _gain.data();
 }
 
 void nlms::set_parameters(std::map<std::string, float>const & p) {
diff --git a/lib/rls.cc b/lib/rls.cc
index 231f194..ac99310 100644
--- a/lib/rls.cc
+++ b/lib/rls.cc
@@ -63,7 +63,7 @@ gr_complex const* rls::update(gr_complex const* beg,
     volk_32f_s32f_multiply_32f((float*)&_inv_corr[k], (float const*)&_inv_corr[k], 1.0f/_lambda, 2*n);
   }
 
-  return &_gain.front();
+  return _gain.data();
 }
 
 void rls::set_parameters(std::map<std::string, float> const& p) {