diff --git a/libavfilter/af_superequalizer.c b/libavfilter/af_superequalizer.c
index 4c9f215f4c..69d29f44c0 100644
--- a/libavfilter/af_superequalizer.c
+++ b/libavfilter/af_superequalizer.c
@@ -126,7 +126,7 @@ static void process_param(float *bc, EqParameter *param, float fs)
 
     for (i = 0; i <= NBANDS; i++) {
         param[i].lower = i == 0 ? 0 : bands[i - 1];
-        param[i].upper = i == NBANDS - 1 ? fs : bands[i];
+        param[i].upper = i == NBANDS ? fs : bands[i];
         param[i].gain  = bc[i];
     }
 }