diff --git a/src/etc/wasm32-shim.js b/src/etc/wasm32-shim.js
index 98d6202a63f..378aae59733 100644
--- a/src/etc/wasm32-shim.js
+++ b/src/etc/wasm32-shim.js
@@ -107,6 +107,10 @@ imports.env = {
   exp2f: function(x) { return Math.pow(2, x); },
   ldexp: function(x, y) { return x * Math.pow(2, y); },
   ldexpf: function(x, y) { return x * Math.pow(2, y); },
+  sin: Math.sin,
+  sinf: Math.sin,
+  cos: Math.cos,
+  cosf: Math.cos,
   log: Math.log,
   log2: Math.log2,
   log10: Math.log10,