diff --git a/libavfilter/af_stereotools.c b/libavfilter/af_stereotools.c
index a22efb02ea..3c796f5b15 100644
--- a/libavfilter/af_stereotools.c
+++ b/libavfilter/af_stereotools.c
@@ -139,10 +139,10 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
     const double sc_level = s->sc_level;
     const double delay = s->delay;
     const int length = s->length;
-    const int mute_l = floor(s->mute_l + 0.5);
-    const int mute_r = floor(s->mute_r + 0.5);
-    const int phase_l = floor(s->phase_l + 0.5);
-    const int phase_r = floor(s->phase_r + 0.5);
+    const int mute_l = s->mute_l;
+    const int mute_r = s->mute_r;
+    const int phase_l = s->phase_l;
+    const int phase_r = s->phase_r;
     double *buffer = s->buffer;
     AVFrame *out;
     double *dst;