diff --git a/src/shaders/SkPerlinNoiseShader.cpp b/src/shaders/SkPerlinNoiseShader.cpp
index 812dc1694f..60b8d617c6 100644
--- a/src/shaders/SkPerlinNoiseShader.cpp
+++ b/src/shaders/SkPerlinNoiseShader.cpp
@@ -573,6 +573,7 @@ static SkScalar fade(SkScalar t) {
     return t * t * t * (t * (t * 6 - 15) + 10);
 }
 
+#define lerp skia_lerp
 static SkScalar lerp(SkScalar t, SkScalar a, SkScalar b) {
     return a + t * (b - a);
 }