diff --git a/src/fm95.c b/src/fm95.c
index 566d222..690d7cd 100644
--- a/src/fm95.c
+++ b/src/fm95.c
@@ -474,7 +474,7 @@ int main(int argc, char **argv) {
 			float ready_l = apply_preemphasis(&preemp_l, l_in);
 			float ready_r = apply_preemphasis(&preemp_r, r_in);
 			ready_l = biquad(&lpf_l, ready_l);
-			ready_l = biquad(&lpf_r, ready_r);
+			ready_r = biquad(&lpf_r, ready_r);
 			ready_l = hard_clip(ready_l*audio_volume, clipper_threshold);
 			ready_r = hard_clip(ready_r*audio_volume, clipper_threshold);