diff --git a/src/algorithms/telemetry_decoder/gnuradio_blocks/sbas_l1_telemetry_decoder_gs.cc b/src/algorithms/telemetry_decoder/gnuradio_blocks/sbas_l1_telemetry_decoder_gs.cc
index e88b9cb2c..3da46865f 100644
--- a/src/algorithms/telemetry_decoder/gnuradio_blocks/sbas_l1_telemetry_decoder_gs.cc
+++ b/src/algorithms/telemetry_decoder/gnuradio_blocks/sbas_l1_telemetry_decoder_gs.cc
@@ -202,8 +202,8 @@ bool sbas_l1_telemetry_decoder_gs::Symbol_Aligner_And_Decoder::get_bits(const st
     const int32_t nbits_requested = symbols.size() / D_SYMBOLS_PER_BIT;
     int32_t nbits_decoded;
     // fill two vectors with the two possible symbol alignments
-    const std::vector<double> symbols_vd1(symbols);  // aligned symbol vector -> copy input symbol vector
-    std::vector<double> symbols_vd2;                 // shifted symbol vector -> add past sample in front of input vector
+    const std::vector<double> &symbols_vd1(symbols);  // aligned symbol vector -> copy input symbol vector
+    std::vector<double> symbols_vd2;                  // shifted symbol vector -> add past sample in front of input vector
     symbols_vd2.push_back(d_past_symbol);
     for (auto symbol_it = symbols.cbegin(); symbol_it != symbols.cend() - 1; ++symbol_it)
         {
diff --git a/src/core/system_parameters/galileo_has_data.cc b/src/core/system_parameters/galileo_has_data.cc
index 0cdc3456b..566f59757 100644
--- a/src/core/system_parameters/galileo_has_data.cc
+++ b/src/core/system_parameters/galileo_has_data.cc
@@ -392,7 +392,7 @@ std::vector<float> Galileo_HAS_data::get_delta_clock_subset_correction_m(uint8_t
         }
 
     auto subset_corr_matrix = this->get_delta_clock_subset_correction_m();
-    const std::vector<float> delta_clock_subset_correction_m_v = subset_corr_matrix[nsys_sub_index];
+    const std::vector<float>& delta_clock_subset_correction_m_v = subset_corr_matrix[nsys_sub_index];
     std::vector<float> delta_clock_subset_correction_m_aux;
     std::vector<uint8_t> num_satellites_subset = this->get_num_subset_satellites();
     uint8_t num_sats_in_this_system_subset = num_satellites_subset[nsys_sub_index];