diff --git a/source/row_neon.cc b/source/row_neon.cc
index 5a1ce50ac..8adbbbb5d 100644
--- a/source/row_neon.cc
+++ b/source/row_neon.cc
@@ -1885,17 +1885,6 @@ void ARGBToUV444MatrixRow_NEON(const uint8_t* src_argb,
 static const struct RgbUVConstants kRgb24I601UVConstants = {{112, 74, 38, 0},
                                                             {18, 94, 112, 0}};
 
-// RGB to JPeg coefficients
-// UB coeff 0.500    = 127
-// UG coeff -0.33126 = 84
-// UR coeff -0.16874 = 43
-// VB coeff -0.08131 = 20
-// VG coeff -0.41869 = 107
-// VR coeff 0.500    = 127 (ignored)
-
-static const struct RgbUVConstants kRgb24JPegUVConstants = {{127, 84, 43, 0},
-                                                            {20, 107, 127, 0}};
-
 void ARGBToUV444Row_NEON(const uint8_t* src_argb,
                          uint8_t* dst_u,
                          uint8_t* dst_v,
@@ -1904,14 +1893,6 @@ void ARGBToUV444Row_NEON(const uint8_t* src_argb,
                             &kRgb24I601UVConstants);
 }
 
-void ARGBToUVJ444Row_NEON(const uint8_t* src_argb,
-                          uint8_t* dst_u,
-                          uint8_t* dst_v,
-                          int width) {
-  ARGBToUV444MatrixRow_NEON(src_argb, dst_u, dst_v, width,
-                            &kRgb24JPegUVConstants);
-}
-
 // clang-format off
 // 16x2 pixels -> 8x1.  width is number of argb pixels. e.g. 16.
 #define RGBTOUV(QB, QG, QR)                                                 \
diff --git a/source/row_neon64.cc b/source/row_neon64.cc
index feab7502e..06c027fdd 100644
--- a/source/row_neon64.cc
+++ b/source/row_neon64.cc
@@ -2539,17 +2539,6 @@ void ARGBToUV444MatrixRow_NEON(const uint8_t* src_argb,
 static const struct RgbUVConstants kRgb24I601UVConstants = {{112, 74, 38, 0},
                                                             {18, 94, 112, 0}};
 
-// RGB to JPeg coefficients
-// UB coeff 0.500    = 127
-// UG coeff -0.33126 = 84
-// UR coeff -0.16874 = 43
-// VB coeff -0.08131 = 20
-// VG coeff -0.41869 = 107
-// VR coeff 0.500    = 127 (ignored)
-
-static const struct RgbUVConstants kRgb24JPegUVConstants = {{127, 84, 43, 0},
-                                                            {20, 107, 127, 0}};
-
 void ARGBToUV444Row_NEON(const uint8_t* src_argb,
                          uint8_t* dst_u,
                          uint8_t* dst_v,
@@ -2558,14 +2547,6 @@ void ARGBToUV444Row_NEON(const uint8_t* src_argb,
                             &kRgb24I601UVConstants);
 }
 
-void ARGBToUVJ444Row_NEON(const uint8_t* src_argb,
-                          uint8_t* dst_u,
-                          uint8_t* dst_v,
-                          int width) {
-  ARGBToUV444MatrixRow_NEON(src_argb, dst_u, dst_v, width,
-                            &kRgb24JPegUVConstants);
-}
-
 #define RGBTOUV_SETUP_REG                                                  \
   "movi       v20.8h, #56, lsl #0  \n" /* UB/VR coefficient (0.875) / 2 */ \
   "movi       v21.8h, #37, lsl #0  \n" /* UG coefficient (-0.5781) / 2  */ \