diff --git a/src/cli/main.rs b/src/cli/main.rs
index 652efe7..06ea44a 100644
--- a/src/cli/main.rs
+++ b/src/cli/main.rs
@@ -66,7 +66,8 @@ fn main() -> anyhow::Result<()> {
                 )
                 .context("Failed to create WAV writer")?;
                 for sample in samples {
-                    writer.write_sample(sample.to_sample::<f32>())?;
+                    let sample_f32: f32 = sample.to_sample();
+                    writer.write_sample(sample_f32)?;
                 }
             }
             let mut writer: Box<dyn Write> = output
@@ -128,5 +129,10 @@ fn parse_and_compile(opts: &PlayOpts) -> anyhow::Result<Vec<f64>> {
     debug!("compiling to samples");
     compiler
         .compile_all(tokens)
+        .inspect(|v| {
+            for sample in v {
+                assert_ne!(&f64::NAN, sample, "Waiter! There's a NaN in my samples!");
+            }
+        })
         .context("Failed to process input tokens")
 }