diff --git a/src/sfizz/MathHelpers.h b/src/sfizz/MathHelpers.h
index 2f63e3ec..d8976c88 100644
--- a/src/sfizz/MathHelpers.h
+++ b/src/sfizz/MathHelpers.h
@@ -397,7 +397,7 @@ constexpr bool checkSpanSizes(const absl::Span<T>& span1, Others... others)
     return _checkSpanSizes(span1.size(), others...);
 }
 
-#define CHECK_SPAN_SIZES(...) ASSERT(checkSpanSizes(__VA_ARGS__))
+#define CHECK_SPAN_SIZES(...) CHECK(checkSpanSizes(__VA_ARGS__))
 
 
 class ScopedRoundingMode {