diff --git a/libavcodec/aacsbr.h b/libavcodec/aacsbr.h
index ad4935d734..cb680cc548 100644
--- a/libavcodec/aacsbr.h
+++ b/libavcodec/aacsbr.h
@@ -36,6 +36,8 @@
 #define ENVELOPE_ADJUSTMENT_OFFSET 2
 #define NOISE_FLOOR_OFFSET 6
 
+struct AACDecContext;
+
 /**
  * SBR VLC tables
  */
diff --git a/libavcodec/aacsbr_template.c b/libavcodec/aacsbr_template.c
index ce3834e2dc..cdfaed636b 100644
--- a/libavcodec/aacsbr_template.c
+++ b/libavcodec/aacsbr_template.c
@@ -1243,7 +1243,7 @@ static void sbr_qmf_synthesis(AVTXContext *mdct, av_tx_fn mdct_fn,
 #endif
 
 /// Generate the subband filtered lowband
-static int sbr_lf_gen(AACDecContext *ac, SpectralBandReplication *sbr,
+static int sbr_lf_gen(SpectralBandReplication *sbr,
                       INTFLOAT X_low[32][40][2], const INTFLOAT W[2][32][32][2],
                       int buf_idx)
 {
@@ -1493,7 +1493,7 @@ void AAC_RENAME(ff_sbr_apply)(AACDecContext *ac, SpectralBandReplication *sbr, i
                          ch ? R : L, sbr->data[ch].analysis_filterbank_samples,
                          (INTFLOAT*)sbr->qmf_filter_scratch,
                          sbr->data[ch].W, sbr->data[ch].Ypos);
-        sbr->c.sbr_lf_gen(ac, sbr, sbr->X_low,
+        sbr->c.sbr_lf_gen(sbr, sbr->X_low,
                           (const INTFLOAT (*)[32][32][2]) sbr->data[ch].W,
                           sbr->data[ch].Ypos);
         sbr->data[ch].Ypos ^= 1;
diff --git a/libavcodec/mips/aacsbr_mips.c b/libavcodec/mips/aacsbr_mips.c
index 0dc09130b7..e0715491e6 100644
--- a/libavcodec/mips/aacsbr_mips.c
+++ b/libavcodec/mips/aacsbr_mips.c
@@ -60,7 +60,7 @@
 
 #if HAVE_INLINE_ASM
 #if HAVE_MIPSFPU
-static int sbr_lf_gen_mips(AACDecContext *ac, SpectralBandReplication *sbr,
+static int sbr_lf_gen_mips(SpectralBandReplication *sbr,
                       float X_low[32][40][2], const float W[2][32][32][2],
                       int buf_idx)
 {
diff --git a/libavcodec/sbr.h b/libavcodec/sbr.h
index 46c68615c8..fe3a39603a 100644
--- a/libavcodec/sbr.h
+++ b/libavcodec/sbr.h
@@ -37,8 +37,6 @@
 #include "aacps.h"
 #include "sbrdsp.h"
 
-struct AACDecContext;
-
 /**
  * Spectral Band Replication header - spectrum parameters that invoke a reset if they differ from the previous header.
  */
@@ -121,7 +119,7 @@ typedef struct SpectralBandReplication SpectralBandReplication;
  * aacsbr functions pointers
  */
 typedef struct AACSBRContext {
-    int (*sbr_lf_gen)(struct AACDecContext *ac, SpectralBandReplication *sbr,
+    int (*sbr_lf_gen)(SpectralBandReplication *sbr,
                       INTFLOAT X_low[32][40][2], const INTFLOAT W[2][32][32][2],
                       int buf_idx);
     void (*sbr_hf_assemble)(INTFLOAT Y1[38][64][2],