diff --git a/apps/srt-live-transmit.cpp b/apps/srt-live-transmit.cpp
index fc41c0d53..30e7fde4d 100644
--- a/apps/srt-live-transmit.cpp
+++ b/apps/srt-live-transmit.cpp
@@ -339,7 +339,7 @@ int main(int argc, char** argv)
     //
     // Set global config variables
     //
-    if (cfg.chunk_size != -1)
+    if (cfg.chunk_size > 0)
         transmit_chunk_size = cfg.chunk_size;
     stats_writer = SrtStatsWriterFactory(cfg.stats_pf);
     transmit_bw_report = cfg.bw_report;
diff --git a/apps/transmitbase.hpp b/apps/transmitbase.hpp
index cc03b9d3a..829e8bf0f 100644
--- a/apps/transmitbase.hpp
+++ b/apps/transmitbase.hpp
@@ -36,6 +36,7 @@ enum PrintFormat
 class SrtStatsWriter
 {
 public:
+    virtual ~SrtStatsWriter() { };
     virtual std::string WriteStats(int sid, const CBytePerfMon& mon) = 0;
     virtual std::string WriteBandwidth(double mbpsBandwidth) = 0;
 };