diff --git a/libavcodec/riscv/h264idct_rvv.S b/libavcodec/riscv/h264idct_rvv.S
index fda1f37a3c..5adcfd295e 100644
--- a/libavcodec/riscv/h264idct_rvv.S
+++ b/libavcodec/riscv/h264idct_rvv.S
@@ -644,7 +644,7 @@ func ff_h264_idct4_add\type\()_\depth\()_rvv, zve32x
         sd      a4, 24(sp)
         ld      a0,  0(a0)                               # dest[0]
         addi    a1, a1, 16 * 4                           # &block_offset[16]
-        vsetivli    zero, 4, e8, mf4, ta, ma
+        vsetivli    zero, 4, e8, m1, ta, ma
         jal     .Lidct4_add4_\depth\()_rvv
 
         ld      a4, 24(sp)                               # nnzc
@@ -655,7 +655,7 @@ func ff_h264_idct4_add\type\()_\depth\()_rvv, zve32x
         ld      a0,  8(a0)                               # dest[1]
         lla     t0, ff_h264_scan8 + 32
 .ifc \type, 8_422
-        vsetivli    zero, 4, e8, mf4, ta, ma
+        vsetivli    zero, 4, e8, m1, ta, ma
         jal     .Lidct4_add4_\depth\()_rvv
 
         ld      a4, 24(sp)                               # nnzc
@@ -665,7 +665,7 @@ func ff_h264_idct4_add\type\()_\depth\()_rvv, zve32x
         addi    a1, t5, (-8 - 4) * 4                     # &block_offset[24]
         ld      a0,  0(a0)                               # dest[0]
         lla     t0, ff_h264_scan8 + 24
-        vsetivli    zero, 4, e8, mf4, ta, ma
+        vsetivli    zero, 4, e8, m1, ta, ma
         jal     .Lidct4_add4_\depth\()_rvv
 
         ld      a4, 24(sp)                               # nnzc
@@ -679,7 +679,7 @@ func ff_h264_idct4_add\type\()_\depth\()_rvv, zve32x
         ld      ra,  8(sp)
         ld      s0,  0(sp)
         addi    sp, sp, 32
-        vsetivli    zero, 4, e8, mf4, ta, ma
+        vsetivli    zero, 4, e8, m1, ta, ma
         j       .Lidct4_add4_\depth\()_rvv
 endfunc
 .endm