diff --git a/src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_telemetry_decoder_cc.cc b/src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_telemetry_decoder_cc.cc
index 41eb414ed..2648788c9 100644
--- a/src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_telemetry_decoder_cc.cc
+++ b/src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_telemetry_decoder_cc.cc
@@ -133,6 +133,17 @@ galileo_telemetry_decoder_cc::galileo_telemetry_decoder_cc(
                 break;
             }
         default:
+            d_bits_per_preamble = 0;
+            d_samples_per_preamble = 0;
+            d_preamble_period_symbols = 0;
+            d_preamble_samples = nullptr;
+            d_secondary_code_samples = nullptr;
+            d_samples_per_symbol = 0U;
+            d_PRN_code_period_ms = 0U;
+            d_required_symbols = 0U;
+            d_frame_length_symbols = 0.0;
+            CodeLength = 0;
+            DataLength = 0;
             std::cout << "Galileo unified telemetry decoder error: Unknown frame type " << std::endl;
         }