diff --git a/gcc/config/riscv/riscv-vector-builtins.def b/gcc/config/riscv/riscv-vector-builtins.def
index 055ee8b2ca4..784b54c81a4 100644
--- a/gcc/config/riscv/riscv-vector-builtins.def
+++ b/gcc/config/riscv/riscv-vector-builtins.def
@@ -483,7 +483,7 @@ DEF_RVV_TYPE (vfloat16m4_t, 17, __rvv_float16m4_t, float16, RVVM4HF, _f16m4,
 /* Define tuple types for SEW = 16, LMUL = M4. */
 DEF_RVV_TUPLE_TYPE (vfloat16m4x2_t, 19, __rvv_float16m4x2_t, vfloat16m4_t, float16, 2, _f16m4x2)
 /* LMUL = 8.  */
-DEF_RVV_TYPE (vfloat16m8_t, 16, __rvv_float16m8_t, float16, RVVM8HF, _f16m8,
+DEF_RVV_TYPE (vfloat16m8_t, 17, __rvv_float16m8_t, float16, RVVM8HF, _f16m8,
 	      _f16, _e16m8)
 
 /* Disable all when !TARGET_VECTOR_ELEN_FP_32.  */