diff --git a/src/mono/mono/mini/interp/interp-simd-intrins.def b/src/mono/mono/mini/interp/interp-simd-intrins.def
index 197b3c269d6612..82aa7f3ea1a0dc 100644
--- a/src/mono/mono/mini/interp/interp-simd-intrins.def
+++ b/src/mono/mono/mini/interp/interp-simd-intrins.def
@@ -356,18 +356,18 @@ INTERP_WASM_SIMD_INTRINSIC_V_V  (ConvertToInt32Saturate, R4, wasm_i32x4_trunc_sa
 INTERP_WASM_SIMD_INTRINSIC_V_V  (ConvertToUInt32Saturate, R4, wasm_u32x4_trunc_sat_f32x4, 0xf9)
 INTERP_WASM_SIMD_INTRINSIC_V_V  (ConvertToInt32Saturate, R8, wasm_i32x4_trunc_sat_f64x2_zero, 0xfc)
 INTERP_WASM_SIMD_INTRINSIC_V_V  (ConvertToUInt32Saturate, R8, wasm_u32x4_trunc_sat_f64x2_zero, 0xfd)
-INTERP_WASM_SIMD_INTRINSIC_V_V  (SignExtendWideningLower, D1, wasm_i16x8_extend_low_i8x16, -1)
-INTERP_WASM_SIMD_INTRINSIC_V_V  (SignExtendWideningLower, D2, wasm_i32x4_extend_low_i16x8, -1)
-INTERP_WASM_SIMD_INTRINSIC_V_V  (SignExtendWideningLower, D4, wasm_i64x2_extend_low_i32x4, -1)
-INTERP_WASM_SIMD_INTRINSIC_V_V  (SignExtendWideningUpper, D1, wasm_i16x8_extend_high_i8x16, -1)
-INTERP_WASM_SIMD_INTRINSIC_V_V  (SignExtendWideningUpper, D2, wasm_i32x4_extend_high_i16x8, -1)
-INTERP_WASM_SIMD_INTRINSIC_V_V  (SignExtendWideningUpper, D4, wasm_i64x2_extend_high_i32x4, -1)
-INTERP_WASM_SIMD_INTRINSIC_V_V  (ZeroExtendWideningLower, D1, wasm_u16x8_extend_low_u8x16, -1)
-INTERP_WASM_SIMD_INTRINSIC_V_V  (ZeroExtendWideningLower, D2, wasm_u32x4_extend_low_u16x8, -1)
-INTERP_WASM_SIMD_INTRINSIC_V_V  (ZeroExtendWideningLower, D4, wasm_u64x2_extend_low_u32x4, -1)
-INTERP_WASM_SIMD_INTRINSIC_V_V  (ZeroExtendWideningUpper, D1, wasm_u16x8_extend_high_u8x16, -1)
-INTERP_WASM_SIMD_INTRINSIC_V_V  (ZeroExtendWideningUpper, D2, wasm_u32x4_extend_high_u16x8, -1)
-INTERP_WASM_SIMD_INTRINSIC_V_V  (ZeroExtendWideningUpper, D4, wasm_u64x2_extend_high_u32x4, -1)
+INTERP_WASM_SIMD_INTRINSIC_V_V  (SignExtendWideningLower, D1, wasm_i16x8_extend_low_i8x16, 0x87)
+INTERP_WASM_SIMD_INTRINSIC_V_V  (SignExtendWideningLower, D2, wasm_i32x4_extend_low_i16x8, 0xa7)
+INTERP_WASM_SIMD_INTRINSIC_V_V  (SignExtendWideningLower, D4, wasm_i64x2_extend_low_i32x4, 0xc7)
+INTERP_WASM_SIMD_INTRINSIC_V_V  (SignExtendWideningUpper, D1, wasm_i16x8_extend_high_i8x16, 0x88)
+INTERP_WASM_SIMD_INTRINSIC_V_V  (SignExtendWideningUpper, D2, wasm_i32x4_extend_high_i16x8, 0xa8)
+INTERP_WASM_SIMD_INTRINSIC_V_V  (SignExtendWideningUpper, D4, wasm_i64x2_extend_high_i32x4, 0xc8)
+INTERP_WASM_SIMD_INTRINSIC_V_V  (ZeroExtendWideningLower, D1, wasm_u16x8_extend_low_u8x16, 0x89)
+INTERP_WASM_SIMD_INTRINSIC_V_V  (ZeroExtendWideningLower, D2, wasm_u32x4_extend_low_u16x8, 0xa9)
+INTERP_WASM_SIMD_INTRINSIC_V_V  (ZeroExtendWideningLower, D4, wasm_u64x2_extend_low_u32x4, 0xc9)
+INTERP_WASM_SIMD_INTRINSIC_V_V  (ZeroExtendWideningUpper, D1, wasm_u16x8_extend_high_u8x16, 0x8a)
+INTERP_WASM_SIMD_INTRINSIC_V_V  (ZeroExtendWideningUpper, D2, wasm_u32x4_extend_high_u16x8, 0xaa)
+INTERP_WASM_SIMD_INTRINSIC_V_V  (ZeroExtendWideningUpper, D4, wasm_u64x2_extend_high_u32x4, 0xca)
 INTERP_WASM_SIMD_INTRINSIC_V_C1 (LoadVector128, ANY, interp_packedsimd_load128, 0x0)
 INTERP_WASM_SIMD_INTRINSIC_V_C1 (LoadScalarVector128, X4, interp_packedsimd_load32_zero, 0x5c)
 INTERP_WASM_SIMD_INTRINSIC_V_C1 (LoadScalarVector128, X8, interp_packedsimd_load64_zero, 0x5d)