diff --git a/libavcodec/aacpsy.c b/libavcodec/aacpsy.c
index bcdbbd661dad812f654ee2796cc47524d05334e3..b1bfc7b1a5f85321ffba7f22a18c67c664d29c78 100644
--- a/libavcodec/aacpsy.c
+++ b/libavcodec/aacpsy.c
@@ -387,7 +387,7 @@ static FFPsyWindowInfo psy_3gpp_window(FFPsyContext *ctx,
  * Calculate band thresholds as suggested in 3GPP TS26.403
  */
 static void psy_3gpp_analyze(FFPsyContext *ctx, int channel,
-                             const float *coefs, FFPsyWindowInfo *wi)
+                             const float *coefs, const FFPsyWindowInfo *wi)
 {
     AacPsyContext *pctx = (AacPsyContext*) ctx->model_priv_data;
     AacPsyChannel *pch  = &pctx->ch[channel];
diff --git a/libavcodec/psymodel.c b/libavcodec/psymodel.c
index a85c29baaad5af5626a7011c14e816d93be0e0de..a2e469c5d743529f14366843cf4e9d0bf4a3eb94 100644
--- a/libavcodec/psymodel.c
+++ b/libavcodec/psymodel.c
@@ -53,7 +53,7 @@ FFPsyWindowInfo ff_psy_suggest_window(FFPsyContext *ctx,
 }
 
 void ff_psy_set_band_info(FFPsyContext *ctx, int channel,
-                          const float *coeffs, FFPsyWindowInfo *wi)
+                          const float *coeffs, const FFPsyWindowInfo *wi)
 {
     ctx->model->analyze(ctx, channel, coeffs, wi);
 }
diff --git a/libavcodec/psymodel.h b/libavcodec/psymodel.h
index bc19d49f73883f2ae48a8efa5742b48ff7e44a73..fc2f6d954c27919122af6c2e606667f71dd1ff65 100644
--- a/libavcodec/psymodel.h
+++ b/libavcodec/psymodel.h
@@ -72,7 +72,7 @@ typedef struct FFPsyModel {
     const char *name;
     int  (*init)   (FFPsyContext *apc);
     FFPsyWindowInfo (*window)(FFPsyContext *ctx, const int16_t *audio, const int16_t *la, int channel, int prev_type);
-    void (*analyze)(FFPsyContext *ctx, int channel, const float *coeffs, FFPsyWindowInfo *wi);
+    void (*analyze)(FFPsyContext *ctx, int channel, const float *coeffs, const FFPsyWindowInfo *wi);
     void (*end)    (FFPsyContext *apc);
 } FFPsyModel;
 
@@ -116,7 +116,7 @@ FFPsyWindowInfo ff_psy_suggest_window(FFPsyContext *ctx,
  * @param wi      window information
  */
 void ff_psy_set_band_info(FFPsyContext *ctx, int channel, const float *coeffs,
-                          FFPsyWindowInfo *wi);
+                          const FFPsyWindowInfo *wi);
 
 /**
  * Cleanup model context at the end.