diff --git a/libavcodec/riscv/vp7dsp_init.c b/libavcodec/riscv/vp7dsp_init.c
index ae7f2d4277..491874483f 100644
--- a/libavcodec/riscv/vp7dsp_init.c
+++ b/libavcodec/riscv/vp7dsp_init.c
@@ -27,6 +27,15 @@
 
 void ff_vp7_luma_dc_wht_rvv(int16_t block[4][4][16], int16_t dc[16]);
 void ff_vp7_idct_add_rvv(uint8_t *dst, int16_t block[16], ptrdiff_t stride);
+void ff_vp78_idct_dc_add_rvv(uint8_t *, int16_t block[16], ptrdiff_t, int dc);
+
+static void ff_vp7_idct_dc_add_rvv(uint8_t *dst, int16_t block[16],
+                                   ptrdiff_t stride)
+{
+    int dc = (23170 * (23170 * block[0] >> 14) + 0x20000) >> 18;
+
+    ff_vp78_idct_dc_add_rvv(dst, block, stride, dc);
+}
 
 av_cold void ff_vp7dsp_init_riscv(VP8DSPContext *c)
 {
@@ -37,8 +46,9 @@ av_cold void ff_vp7dsp_init_riscv(VP8DSPContext *c)
         ff_rv_vlen_least(128)) {
 #if __riscv_xlen >= 64
         c->vp8_luma_dc_wht = ff_vp7_luma_dc_wht_rvv;
-#endif
         c->vp8_idct_add = ff_vp7_idct_add_rvv;
+#endif
+        c->vp8_idct_dc_add = ff_vp7_idct_dc_add_rvv;
     }
 #endif
 }
diff --git a/libavcodec/riscv/vp8dsp_rvv.S b/libavcodec/riscv/vp8dsp_rvv.S
index 3360a38cac..7a3ab576e9 100644
--- a/libavcodec/riscv/vp8dsp_rvv.S
+++ b/libavcodec/riscv/vp8dsp_rvv.S
@@ -98,6 +98,29 @@ func ff_vp8_luma_dc_wht_rvv, zve64x
 endfunc
 #endif
 
+func ff_vp8_idct_dc_add_rvv, zve32x
+        lh      a3, (a1)
+        addi    a3, a3, 4
+        srai    a3, a3, 3
+        # fall through
+endfunc
+
+func ff_vp78_idct_dc_add_rvv, zve32x
+        csrwi      vxrm, 0
+        vsetivli   zero, 4, e8, mf4, ta, ma
+        sh         zero, (a1)
+        vlse32.v   v8, (a0), a2
+        vsetivli   zero, 16, e16, m2, ta, ma
+        vzext.vf2  v16, v8
+        vadd.vx    v16, v16, a3
+        vmax.vx    v16, v16, zero
+        vsetvli    zero, zero, e8, m1, ta, ma
+        vnclipu.wi v8, v16, 0
+        vsetivli   zero, 4, e8, mf4, ta, ma
+        vsse32.v   v8, (a0), a2
+        ret
+endfunc
+
 .macro vp8_idct_dc_add
         vlse32.v      v0, (a0), a2
         lh            a5, 0(a1)
@@ -120,13 +143,6 @@ endfunc
         addi          a1, a1, 32
 .endm
 
-func ff_vp8_idct_dc_add_rvv, zve32x
-        vsetivli      zero, 4, e8, mf4, ta, ma
-        vp8_idct_dc_add
-
-        ret
-endfunc
-
 func ff_vp8_idct_dc_add4y_rvv, zve32x
         vsetivli      zero, 4, e8, mf4, ta, ma
         .rept 3