diff --git a/libavcodec/riscv/opusdsp_init.c b/libavcodec/riscv/opusdsp_init.c
index a5e3e4748a..7fde9b1fa8 100644
--- a/libavcodec/riscv/opusdsp_init.c
+++ b/libavcodec/riscv/opusdsp_init.c
@@ -27,6 +27,8 @@
 
 void ff_opus_postfilter_rvv_128(float *data, int period, float *g, int len);
 void ff_opus_postfilter_rvv_256(float *data, int period, float *g, int len);
+void ff_opus_postfilter_rvv_512(float *data, int period, float *g, int len);
+void ff_opus_postfilter_rvv_1024(float *data, int period, float *g, int len);
 
 av_cold void ff_opus_dsp_init_riscv(OpusDSP *d)
 {
@@ -41,6 +43,12 @@ av_cold void ff_opus_dsp_init_riscv(OpusDSP *d)
         case 32:
             d->postfilter = ff_opus_postfilter_rvv_256;
             break;
+        case 64:
+            d->postfilter = ff_opus_postfilter_rvv_512;
+            break;
+        case 128:
+            d->postfilter = ff_opus_postfilter_rvv_512;
+            break;
         }
 #endif
 }
diff --git a/libavcodec/riscv/opusdsp_rvv.S b/libavcodec/riscv/opusdsp_rvv.S
index 243c9a5e52..b3d23a9de5 100644
--- a/libavcodec/riscv/opusdsp_rvv.S
+++ b/libavcodec/riscv/opusdsp_rvv.S
@@ -25,6 +25,16 @@ func ff_opus_postfilter_rvv_128, zve32f
         j       1f
 endfunc
 
+func ff_opus_postfilter_rvv_512, zve32f
+        lvtypei a5, e32, mf2, ta, ma
+        j       1f
+endfunc
+
+func ff_opus_postfilter_rvv_1024, zve32f
+        lvtypei a5, e32, mf4, ta, ma
+        j       1f
+endfunc
+
 func ff_opus_postfilter_rvv_256, zve32f
         lvtypei a5, e32, m1, ta, ma
 1: