diff --git a/libavfilter/af_arnndn.c b/libavfilter/af_arnndn.c
index 7688b31b0c..7a26f89709 100644
--- a/libavfilter/af_arnndn.c
+++ b/libavfilter/af_arnndn.c
@@ -782,8 +782,8 @@ static float compute_pitch_gain(float xy, float xx, float yy)
 }
 
 static const int second_check[16] = {0, 0, 3, 2, 3, 2, 5, 2, 3, 2, 3, 2, 5, 2, 3, 2};
-static const float remove_doubling(float *x, int maxperiod, int minperiod,
-                                   int N, int *T0_, int prev_period, float prev_gain)
+static float remove_doubling(float *x, int maxperiod, int minperiod, int N,
+                             int *T0_, int prev_period, float prev_gain)
 {
     int k, i, T, T0;
     float g, g0;