diff --git a/src/dsp/dec_neon.c b/src/dsp/dec_neon.c
index e8a5a54d..b3e68883 100644
--- a/src/dsp/dec_neon.c
+++ b/src/dsp/dec_neon.c
@@ -494,7 +494,7 @@ static void ApplyFilter2(const int8x16_t p0s, const int8x16_t q0s,
   *oq0 = FlipSignBack(sq0);
 }
 
-#if defined(USE_INTRINSICS)
+#if defined(WEBP_USE_INTRINSICS)
 
 static void DoFilter2(const uint8x16_t p1, const uint8x16_t p0,
                       const uint8x16_t q0, const uint8x16_t q1,
@@ -626,7 +626,7 @@ static void SimpleHFilter16(uint8_t* p, int stride, int thresh) {
   );
 }
 
-#endif    // USE_INTRINSICS
+#endif    // WEBP_USE_INTRINSICS
 
 static void SimpleVFilter16i(uint8_t* p, int stride, int thresh) {
   uint32_t k;
@@ -986,7 +986,7 @@ static void HFilter8i(uint8_t* u, uint8_t* v, int stride,
 static const int16_t kC1 = 20091;
 static const int16_t kC2 = 17734;  // half of kC2, actually. See comment above.
 
-#if defined(USE_INTRINSICS)
+#if defined(WEBP_USE_INTRINSICS)
 static WEBP_INLINE void Transpose8x2(const int16x8_t in0, const int16x8_t in1,
                                      int16x8x2_t* const out) {
   // a0 a1 a2 a3 | b0 b1 b2 b3   => a0 b0 c0 d0 | a1 b1 c1 d1
@@ -1163,7 +1163,7 @@ static void TransformOne(const int16_t* in, uint8_t* dst) {
   );
 }
 
-#endif    // USE_INTRINSICS
+#endif    // WEBP_USE_INTRINSICS
 
 static void TransformTwo(const int16_t* in, uint8_t* dst, int do_two) {
   TransformOne(in, dst);
diff --git a/src/dsp/dsp.h b/src/dsp/dsp.h
index 4008ccd8..10467431 100644
--- a/src/dsp/dsp.h
+++ b/src/dsp/dsp.h
@@ -74,7 +74,7 @@ extern "C" {
 
 #if defined(_MSC_VER) && _MSC_VER >= 1700 && defined(_M_ARM)
 #define WEBP_USE_NEON
-#define USE_INTRINSICS
+#define WEBP_USE_INTRINSICS
 #endif
 
 #if defined(__mips__) && !defined(__mips64) && (__mips_isa_rev < 6)
diff --git a/src/dsp/enc_neon.c b/src/dsp/enc_neon.c
index 1b912f0f..725ebfca 100644
--- a/src/dsp/enc_neon.c
+++ b/src/dsp/enc_neon.c
@@ -32,9 +32,9 @@ static const int16_t kC2 = 17734;  // half of kC2, actually. See comment above.
 
 // This code works but is *slower* than the inlined-asm version below
 // (with gcc-4.6). So we disable it for now. Later, it'll be conditional to
-// USE_INTRINSICS define.
+// WEBP_USE_INTRINSICS define.
 // With gcc-4.8, it's a little faster speed than inlined-assembly.
-#if defined(USE_INTRINSICS)
+#if defined(WEBP_USE_INTRINSICS)
 
 // Treats 'v' as an uint8x8_t and zero extends to an int16x8_t.
 static WEBP_INLINE int16x8_t ConvertU8ToS16(uint32x2_t v) {
@@ -241,7 +241,7 @@ static void ITransformOne(const uint8_t* ref,
   );
 }
 
-#endif    // USE_INTRINSICS
+#endif    // WEBP_USE_INTRINSICS
 
 static void ITransform(const uint8_t* ref,
                        const int16_t* in, uint8_t* dst, int do_two) {
@@ -263,7 +263,7 @@ static uint8x16_t Load4x4(const uint8_t* src) {
 
 // Forward transform.
 
-#if defined(USE_INTRINSICS)
+#if defined(WEBP_USE_INTRINSICS)
 
 static WEBP_INLINE void Transpose4x4_S16(const int16x4_t A, const int16x4_t B,
                                          const int16x4_t C, const int16x4_t D,
diff --git a/src/dsp/lossless_neon.c b/src/dsp/lossless_neon.c
index 464550e9..a9e2ba19 100644
--- a/src/dsp/lossless_neon.c
+++ b/src/dsp/lossless_neon.c
@@ -141,7 +141,7 @@ static void ConvertBGRAToRGB(const uint32_t* src,
 
 //------------------------------------------------------------------------------
 
-#ifdef USE_INTRINSICS
+#ifdef WEBP_USE_INTRINSICS
 
 static WEBP_INLINE uint32_t Average2(const uint32_t* const a,
                                      const uint32_t* const b) {
@@ -295,7 +295,7 @@ static void AddGreenToBlueAndRed(uint32_t* argb_data, int num_pixels) {
 
 #endif   // !__aarch64__
 
-#endif   // USE_INTRINSICS
+#endif   // WEBP_USE_INTRINSICS
 
 #endif   // WEBP_USE_NEON
 
@@ -309,7 +309,7 @@ WEBP_TSAN_IGNORE_FUNCTION void VP8LDspInitNEON(void) {
   VP8LConvertBGRAToBGR = ConvertBGRAToBGR;
   VP8LConvertBGRAToRGB = ConvertBGRAToRGB;
 
-#ifdef USE_INTRINSICS
+#ifdef WEBP_USE_INTRINSICS
   VP8LPredictors[5] = Predictor5;
   VP8LPredictors[6] = Predictor6;
   VP8LPredictors[7] = Predictor7;
diff --git a/src/dsp/neon.h b/src/dsp/neon.h
index 7e06eaee..0a062668 100644
--- a/src/dsp/neon.h
+++ b/src/dsp/neon.h
@@ -19,7 +19,7 @@
 // Right now, some intrinsics functions seem slower, so we disable them
 // everywhere except aarch64 where the inline assembly is incompatible.
 #if defined(__aarch64__)
-#define USE_INTRINSICS   // use intrinsics when possible
+#define WEBP_USE_INTRINSICS   // use intrinsics when possible
 #endif
 
 #define INIT_VECTOR2(v, a, b) do {  \