diff --git a/libm/src/k_sin.c b/libm/src/k_sin.c
index ae06a9d..ee641d4 100644
--- a/libm/src/k_sin.c
+++ b/libm/src/k_sin.c
@@ -60,6 +60,16 @@
 double
 __kernel_sin(double x, double y, int iy)
 {
+#if defined(KRAIT_NEON_OPTIMIZATION)
+	double z,zz,r,v;
+
+	z	=  x*x;
+	zz  =  z*z;
+	v	=  z*x;
+	r	=  S2+z*((S3+z*S4)+zz*(S5+z*S6));
+	if(iy==0) return x+v*(S1+z*r);
+	else      return x-((z*(half*y-v*r)-y)-v*S1);
+#else
 	double z,r,v;
 
 	z	=  x*x;
@@ -67,4 +77,5 @@
 	r	=  S2+z*(S3+z*(S4+z*(S5+z*S6)));
 	if(iy==0) return x+v*(S1+z*r);
 	else      return x-((z*(half*y-v*r)-y)-v*S1);
+#endif
 }