diff --git a/libavcodec/riscv/vp9_mc_rvv.S b/libavcodec/riscv/vp9_mc_rvv.S
index 7811cd9928..7cb38ec94a 100644
--- a/libavcodec/riscv/vp9_mc_rvv.S
+++ b/libavcodec/riscv/vp9_mc_rvv.S
@@ -37,9 +37,9 @@
 .endm
 
 .macro copy_avg len
-func ff_avg\len\()_rvv, zve32x
+func ff_vp9_avg\len\()_rvv, zve32x
         csrwi           vxrm, 0
-        vsetvlstatic8   \len t0 64
+        vsetvlstatic8   \len, t0, 64
 1:
         vle8.v          v8, (a2)
         vle8.v          v16, (a0)
diff --git a/libavcodec/riscv/vp9dsp.h b/libavcodec/riscv/vp9dsp.h
index 79330b4968..ff8431591c 100644
--- a/libavcodec/riscv/vp9dsp.h
+++ b/libavcodec/riscv/vp9dsp.h
@@ -138,11 +138,11 @@ void ff_avg_bilin_##SIZE##hv_rvv(uint8_t *dst, ptrdiff_t dststride,        \
                                  int h, int mx, int my);
 
 #define VP9_COPY_AVG_RISCV_RVV_FUNC(SIZE)                           \
-void ff_copy##SIZE##_rvv(uint8_t *dst, ptrdiff_t dststride,        \
+void ff_vp9_copy##SIZE##_rvv(uint8_t *dst, ptrdiff_t dststride,    \
                          const uint8_t *src, ptrdiff_t srcstride,  \
                          int h, int mx, int my);                   \
                                                                    \
-void ff_avg##SIZE##_rvv(uint8_t *dst, ptrdiff_t dststride,         \
+void ff_vp9_avg##SIZE##_rvv(uint8_t *dst, ptrdiff_t dststride,     \
                         const uint8_t *src, ptrdiff_t srcstride,   \
                         int h, int mx, int my);
 
diff --git a/libavcodec/riscv/vp9dsp_init.c b/libavcodec/riscv/vp9dsp_init.c
index 6bfe23563a..454dcd963f 100644
--- a/libavcodec/riscv/vp9dsp_init.c
+++ b/libavcodec/riscv/vp9dsp_init.c
@@ -52,10 +52,10 @@ static av_cold void vp9dsp_mc_init_riscv(VP9DSPContext *dsp, int bpp)
     if (bpp == 8 && (flags & AV_CPU_FLAG_RVV_I32) && ff_rv_vlen_least(128)) {
 
 #define init_fpel(idx1, sz)                                           \
-    dsp->mc[idx1][FILTER_8TAP_SMOOTH ][1][0][0] = ff_avg##sz##_rvv;  \
-    dsp->mc[idx1][FILTER_8TAP_REGULAR][1][0][0] = ff_avg##sz##_rvv;  \
-    dsp->mc[idx1][FILTER_8TAP_SHARP  ][1][0][0] = ff_avg##sz##_rvv;  \
-    dsp->mc[idx1][FILTER_BILINEAR    ][1][0][0] = ff_avg##sz##_rvv
+    dsp->mc[idx1][FILTER_8TAP_SMOOTH ][1][0][0] = ff_vp9_avg##sz##_rvv;  \
+    dsp->mc[idx1][FILTER_8TAP_REGULAR][1][0][0] = ff_vp9_avg##sz##_rvv;  \
+    dsp->mc[idx1][FILTER_8TAP_SHARP  ][1][0][0] = ff_vp9_avg##sz##_rvv;  \
+    dsp->mc[idx1][FILTER_BILINEAR    ][1][0][0] = ff_vp9_avg##sz##_rvv
 
     init_fpel(0, 64);
     init_fpel(1, 32);