diff --git a/libavcodec/aac/aacdec_usac.c b/libavcodec/aac/aacdec_usac.c
index 4856c1786b..32b3c534bf 100644
--- a/libavcodec/aac/aacdec_usac.c
+++ b/libavcodec/aac/aacdec_usac.c
@@ -1134,7 +1134,7 @@ static void complex_stereo_downmix_cur(AACDecContext *ac, ChannelElement *cpe,
     }
 }
 
-static void complex_stereo_interpolate_imag(float *im, float *re, const float f[6],
+static void complex_stereo_interpolate_imag(float *im, float *re, const float f[7],
                                             int len, int factor_even, int factor_odd)
 {
     int i = 0;