diff --git a/src/sfizz/Config.h b/src/sfizz/Config.h
index 63c66ff2..a0995a5d 100644
--- a/src/sfizz/Config.h
+++ b/src/sfizz/Config.h
@@ -34,6 +34,7 @@ enum Oversampling {
 namespace config {
     constexpr float defaultSampleRate { 48000 };
     constexpr int defaultSamplesPerBlock { 1024 };
+    constexpr int maxBlockSize { 8192 };
     constexpr int preloadSize { 8192 };
     constexpr int numChannels { 2 };
     constexpr int numBackgroundThreads { 4 };
diff --git a/src/sfizz/Synth.cpp b/src/sfizz/Synth.cpp
index 2f8bd9b8..2c46bd2f 100644
--- a/src/sfizz/Synth.cpp
+++ b/src/sfizz/Synth.cpp
@@ -329,6 +329,8 @@ void sfz::Synth::garbageCollect() noexcept
 
 void sfz::Synth::setSamplesPerBlock(int samplesPerBlock) noexcept
 {
+    ASSERT(samplesPerBlock < config::maxBlockSize);
+
     AtomicDisabler callbackDisabler { canEnterCallback };
 
     while (inCallback) {