diff --git a/libavcodec/riscv/pixblockdsp_init.c b/libavcodec/riscv/pixblockdsp_init.c
index 2735776105..28caa99dff 100644
--- a/libavcodec/riscv/pixblockdsp_init.c
+++ b/libavcodec/riscv/pixblockdsp_init.c
@@ -48,6 +48,7 @@ av_cold void ff_pixblockdsp_init_riscv(PixblockDSPContext *c,
 #if HAVE_RV
     int cpu_flags = av_get_cpu_flags();
 
+#if __riscv_xlen >= 64
     if (cpu_flags & AV_CPU_FLAG_RVI) {
         if (high_bit_depth)
             c->get_pixels = ff_get_pixels_16_rvi;
@@ -61,7 +62,7 @@ av_cold void ff_pixblockdsp_init_riscv(PixblockDSPContext *c,
         else
             c->get_pixels_unaligned = ff_get_pixels_8_rvi;
     }
-
+#endif
 #if HAVE_RVV
     if ((cpu_flags & AV_CPU_FLAG_RVV_I32) && ff_rv_vlen_least(128)) {
         c->diff_pixels = ff_diff_pixels_unaligned_rvv;
diff --git a/libavcodec/riscv/pixblockdsp_rvi.S b/libavcodec/riscv/pixblockdsp_rvi.S
index ed1af70251..c47204856b 100644
--- a/libavcodec/riscv/pixblockdsp_rvi.S
+++ b/libavcodec/riscv/pixblockdsp_rvi.S
@@ -20,6 +20,7 @@
 
 #include "libavutil/riscv/asm.S"
 
+#if __riscv_xlen >= 64
 func ff_get_pixels_8_rvi
         lpad    0
 .irp row, 0, 1, 2, 3, 4, 5, 6, 7
@@ -58,3 +59,4 @@ func ff_get_pixels_16_rvi
 .endr
         ret
 endfunc
+#endif