diff --git a/src/dsp/enc_neon.c b/src/dsp/enc_neon.c
index 377d31f3..36f26946 100644
--- a/src/dsp/enc_neon.c
+++ b/src/dsp/enc_neon.c
@@ -856,9 +856,10 @@ static int QuantizeBlock(int16_t in[16], int16_t out[16],
   const int16x8_t out0 = Quantize(in, mtx, 0);
   const int16x8_t out1 = Quantize(in, mtx, 8);
   uint8x8x4_t shuffles;
-  // vtbl4_u8 is marked unavailable for iOS arm64, use wider versions there.
+  // vtbl?_u8 are marked unavailable for iOS arm64 with Xcode < 6.3, use
+  // non-standard versions there.
 #if defined(__APPLE__) && defined(__aarch64__) && \
-    defined(__apple_build_version__)
+    defined(__apple_build_version__) && (__apple_build_version__< 6020037)
   uint8x16x2_t all_out;
   INIT_VECTOR2(all_out, vreinterpretq_u8_s16(out0), vreinterpretq_u8_s16(out1));
   INIT_VECTOR4(shuffles,
diff --git a/src/dsp/lossless_neon.c b/src/dsp/lossless_neon.c
index 17dce9ab..e404646a 100644
--- a/src/dsp/lossless_neon.c
+++ b/src/dsp/lossless_neon.c
@@ -259,9 +259,10 @@ static uint32_t Predictor13(uint32_t left, const uint32_t* const top) {
 //------------------------------------------------------------------------------
 // Subtract-Green Transform
 
-// vtbl?_u8 are marked unavailable for iOS arm64, use wider versions there.
+// vtbl?_u8 are marked unavailable for iOS arm64 with Xcode < 6.3, use
+// non-standard versions there.
 #if defined(__APPLE__) && defined(__aarch64__) && \
-    defined(__apple_build_version__)
+    defined(__apple_build_version__) && (__apple_build_version__< 6020037)
 #define USE_VTBLQ
 #endif