diff --git a/lib/emscripten/src/emscripten_target.rs b/lib/emscripten/src/emscripten_target.rs
index df3319ab8..3e0ab599a 100644
--- a/lib/emscripten/src/emscripten_target.rs
+++ b/lib/emscripten/src/emscripten_target.rs
@@ -15,6 +15,11 @@ pub fn getTempRet0(ctx: &mut Ctx) -> i32 {
     get_emscripten_data(ctx).temp_ret_0
 }
 
+pub fn _alarm(_ctx: &mut Ctx, _seconds: u32) -> i32 {
+    debug!("emscripten::_alarm({})", _seconds);
+    0
+}
+
 pub fn _atexit(_ctx: &mut Ctx, _func: i32) -> i32 {
     debug!("emscripten::_atexit");
     // TODO: implement atexit properly
diff --git a/lib/emscripten/src/lib.rs b/lib/emscripten/src/lib.rs
index 039ad2af6..5fc06d74b 100644
--- a/lib/emscripten/src/lib.rs
+++ b/lib/emscripten/src/lib.rs
@@ -722,6 +722,7 @@ pub fn generate_emscripten_env(globals: &mut EmscriptenGlobals) -> ImportObject
         "_dlsym" => func!(crate::linking::_dlsym),
 
         // wasm32-unknown-emscripten
+        "_alarm" => func!(crate::emscripten_target::_alarm),
         "_atexit" => func!(crate::emscripten_target::_atexit),
         "setTempRet0" => func!(crate::emscripten_target::setTempRet0),
         "getTempRet0" => func!(crate::emscripten_target::getTempRet0),