diff --git a/lib/emscripten/src/lib.rs b/lib/emscripten/src/lib.rs
index 62cee5c601e..1d88ba7a881 100644
--- a/lib/emscripten/src/lib.rs
+++ b/lib/emscripten/src/lib.rs
@@ -756,6 +756,7 @@ pub fn generate_emscripten_env(globals: &mut EmscriptenGlobals) -> ImportObject
         },
         "asm2wasm" => {
             "f64-rem" => func!(crate::math::f64_rem),
+            "f64-to-int" => func!(crate::math::f64_to_int),
         },
     };
 
diff --git a/lib/emscripten/src/math.rs b/lib/emscripten/src/math.rs
index c73580d7776..704a5885466 100644
--- a/lib/emscripten/src/math.rs
+++ b/lib/emscripten/src/math.rs
@@ -39,7 +39,7 @@ pub fn _emscripten_random(_ctx: &mut Ctx) -> f64 {
     -1.0
 }
 
-// emscripten: f64-rem
+// emscripten: asm2wasm.f64-rem
 pub fn f64_rem(_ctx: &mut Ctx, x: f64, y: f64) -> f64 {
     debug!("emscripten::f64-rem");
     x % y
@@ -59,3 +59,9 @@ pub fn exp(_ctx: &mut Ctx, value: f64) -> f64 {
 pub fn log(_ctx: &mut Ctx, value: f64) -> f64 {
     value.ln()
 }
+
+// emscripten: asm2wasm.f64-to-int
+pub fn f64_to_int(_ctx: &mut Ctx, value: f64) -> i32 {
+    debug!("emscripten::f64_to_int {}", value);
+    value as i32
+}