diff --git a/codec/processing/src/arm64/down_sample_aarch64_neon.S b/codec/processing/src/arm64/down_sample_aarch64_neon.S
index 263c130c..511dfdf1 100644
--- a/codec/processing/src/arm64/down_sample_aarch64_neon.S
+++ b/codec/processing/src/arm64/down_sample_aarch64_neon.S
@@ -174,9 +174,9 @@ comp_ds_bilinear_onethird_loop0:
     //restore   the tailer for the unasigned size
     st1     {v16.16b}, [x0]
 WELS_ASM_AARCH64_FUNC_END
-;void DyadicBilinearQuarterDownsampler_AArch64_neon(uint8_t* pDst, const int32_t kiDstStride,
-;uint8_t* pSrc, const int32_t kiSrcStride,
-;const int32_t kiSrcWidth, const int32_t kiHeight);
+//void DyadicBilinearQuarterDownsampler_AArch64_neon(uint8_t* pDst, const int32_t kiDstStride,
+//uint8_t* pSrc, const int32_t kiSrcStride,
+//const int32_t kiSrcWidth, const int32_t kiHeight);
 
 WELS_ASM_AARCH64_FUNC_BEGIN DyadicBilinearQuarterDownsampler_AArch64_neon
     //Initialize the register
@@ -232,9 +232,9 @@ comp_ds_bilinear_quarter_loop0:
     st1     {v16.16b}, [x0]
 WELS_ASM_AARCH64_FUNC_END
 
-;void GeneralBilinearAccurateDownsampler_AArch64_neon (uint8_t* pDst, const int32_t kiDstStride,
-;    const int32_t kiDstWidth, const int32_t kiDstHeight,
-;   uint8_t* pSrc, const int32_t kiSrcStride, const uint32_t kuiScaleX, const uint32_t kuiScaleY);
+//void GeneralBilinearAccurateDownsampler_AArch64_neon (uint8_t* pDst, const int32_t kiDstStride,
+//    const int32_t kiDstWidth, const int32_t kiDstHeight,
+//   uint8_t* pSrc, const int32_t kiSrcStride, const uint32_t kuiScaleX, const uint32_t kuiScaleY);
 WELS_ASM_AARCH64_FUNC_BEGIN GeneralBilinearAccurateDownsampler_AArch64_neon
     mov     w10, #32767
     and     w8, w6, w10
diff --git a/codec/processing/src/arm64/pixel_sad_aarch64_neon.S b/codec/processing/src/arm64/pixel_sad_aarch64_neon.S
index 18cbc8a8..9d09ed77 100644
--- a/codec/processing/src/arm64/pixel_sad_aarch64_neon.S
+++ b/codec/processing/src/arm64/pixel_sad_aarch64_neon.S
@@ -32,7 +32,7 @@
 
 #ifdef HAVE_NEON_AARCH64
 #include "arm_arch64_common_macro.S"
-;int32_t WelsProcessingSampleSad8x8_AArch64_neon (uint8_t*, int32_t, uint8_t*, int32_t);
+//int32_t WelsProcessingSampleSad8x8_AArch64_neon (uint8_t*, int32_t, uint8_t*, int32_t);
 WELS_ASM_AARCH64_FUNC_BEGIN WelsProcessingSampleSad8x8_AArch64_neon
     SIGN_EXTENSION x1, w1
     SIGN_EXTENSION x3, w3