diff --git a/lib/std/math/math.c3 b/lib/std/math/math.c3
index 84ba831a3..8c3b98984 100644
--- a/lib/std/math/math.c3
+++ b/lib/std/math/math.c3
@@ -1054,10 +1054,16 @@ extern fn double _atan(double x) @extern("atan");
 extern fn float _atanf(float x) @extern("atanf");
 extern fn double _atan2(double, double) @extern("atan2");
 extern fn float _atan2f(float, float) @extern("atan2f");
+
 extern fn void _sincos(double, double*, double*) @extern("__sincos") @link("m") @if(env::DARWIN);
 extern fn void _sincosf(float, float*, float*) @extern("__sincosf") @link("m") @if(env::DARWIN);
-extern fn void _sincos(double, double*, double*) @extern("sincos") @link("m") @if(!env::DARWIN);
-extern fn void _sincosf(float, float*, float*) @extern("sincosf") @link("m") @if(!env::DARWIN);
+
+extern fn void _sincos(double, double*, double*) @extern("sincos") @link("m") @if(!env::DARWIN && !env::WIN32);
+extern fn void _sincosf(float, float*, float*) @extern("sincosf") @link("m") @if(!env::DARWIN && !env::WIN32);
+
+fn void _sincos(double a, double* s, double* c) @extern("sincos") @if(env::WIN32) { *s = sin(a); *c = cos(a); }
+fn void _sincosf(float a, float* s, float* c) @extern("sincosf") @if(env::WIN32)  { *s = sin(a); *c = cos(a); }
+
 extern fn double _tan(double x) @extern("tan");
 extern fn float _tanf(float x) @extern("tanf");
 extern fn double _scalbn(double x, int n) @extern("scalbn");