diff --git a/sfizz/Synth.cpp b/sfizz/Synth.cpp
index d966ed8c..a026a425 100644
--- a/sfizz/Synth.cpp
+++ b/sfizz/Synth.cpp
@@ -35,6 +35,11 @@
 #include <utility>
 using namespace std::literals;
 
+sfz::Synth::Synth()
+{
+    resetVoices(this->numVoices);
+}
+
 sfz::Synth::Synth(int numVoices)
 {
     resetVoices(numVoices);
diff --git a/sfizz/Synth.h b/sfizz/Synth.h
index 527771f2..7cffeac2 100644
--- a/sfizz/Synth.h
+++ b/sfizz/Synth.h
@@ -39,7 +39,7 @@ namespace sfz {
 
 class Synth : public Parser {
 public:
-    Synth() {}
+    Synth();
     Synth(int numVoices);
     bool loadSfzFile(const fs::path& file) final;
     int getNumRegions() const noexcept;