diff --git a/models/for-tests-ggml-parakeet-tdt-bad-nfft0.bin b/models/for-tests-ggml-parakeet-tdt-bad-nfft0.bin
index bba7d72b2..ac74dd15c 100644
Binary files a/models/for-tests-ggml-parakeet-tdt-bad-nfft0.bin and b/models/for-tests-ggml-parakeet-tdt-bad-nfft0.bin differ
diff --git a/models/for-tests-ggml-parakeet-tdt.bin b/models/for-tests-ggml-parakeet-tdt.bin
index 8b1dda1fe..dc23bb640 100644
Binary files a/models/for-tests-ggml-parakeet-tdt.bin and b/models/for-tests-ggml-parakeet-tdt.bin differ
diff --git a/models/generate-parakeet-test-model.py b/models/generate-parakeet-test-model.py
index 8b31a042f..3ed8b2b1d 100755
--- a/models/generate-parakeet-test-model.py
+++ b/models/generate-parakeet-test-model.py
@@ -86,7 +86,8 @@ def generate(output_path, n_fft_override=None):
 
         fout.write(struct.pack("i", n_mels))
         fout.write(struct.pack("i", n_freqs))
-        f32(n_mels, n_freqs).tofile(fout)
+        # Mel filter must be non-negative.
+        np.abs(f32(n_mels, n_freqs)).tofile(fout)
 
         fout.write(struct.pack("i", n_fft))
         f32(n_fft).tofile(fout)