diff --git a/lib/emscripten/src/jmp.rs b/lib/emscripten/src/jmp.rs
index c5b54f02b..aa9367470 100644
--- a/lib/emscripten/src/jmp.rs
+++ b/lib/emscripten/src/jmp.rs
@@ -37,6 +37,18 @@ pub fn __longjmp(ctx: &mut Ctx, env_addr: u32, val: c_int) {
     };
 }
 
+/// _longjmp
+pub fn _longjmp(ctx: &mut Ctx, env_addr: i32, val: c_int) {
+    let val = if val == 0 {
+        1
+    } else {
+        val
+    };
+    get_emscripten_data(ctx).set_threw.as_ref().expect("set_threw is None").call(env_addr, val).expect("set_threw failed to call");
+    panic!("longjmp");
+}
+
+
 extern "C" {
     fn setjmp(env: *mut c_void) -> c_int;
     fn longjmp(env: *mut c_void, val: c_int) -> !;
diff --git a/lib/emscripten/src/lib.rs b/lib/emscripten/src/lib.rs
index 09493c813..1ae84c82d 100644
--- a/lib/emscripten/src/lib.rs
+++ b/lib/emscripten/src/lib.rs
@@ -127,6 +127,10 @@ pub struct EmscriptenData<'a> {
     pub dyn_call_vijj: Option<Func<'a, (i32, i32, i32, i32, i32, i32)>>,
     pub dyn_call_viidii: Option<Func<'a, (i32, i32, i32, f64, i32, i32)>>,
     pub temp_ret_0: i32,
+
+    pub stack_save: Option<Func<'a, (), i32>>,
+    pub stack_restore: Option<Func<'a, (i32)>>,
+    pub set_threw: Option<Func<'a, (i32, i32)>>,
 }
 
 impl<'a> EmscriptenData<'a> {
@@ -186,6 +190,10 @@ impl<'a> EmscriptenData<'a> {
         let dyn_call_vijj = instance.func("dynCall_vijj").ok();
         let dyn_call_viidii = instance.func("dynCall_viidii").ok();
 
+        let stack_save = instance.func("stackSave").ok();
+        let stack_restore = instance.func("stackRestore").ok();
+        let set_threw = instance.func("_setThrew").ok();
+
         EmscriptenData {
             malloc,
             free,
@@ -238,6 +246,10 @@ impl<'a> EmscriptenData<'a> {
             dyn_call_vijj,
             dyn_call_viidii,
             temp_ret_0: 0,
+
+            stack_save,
+            stack_restore,
+            set_threw
         }
     }
 }
@@ -650,7 +662,8 @@ pub fn generate_emscripten_env(globals: &mut EmscriptenGlobals) -> ImportObject
         // Jump
         "__setjmp" => func!(crate::jmp::__setjmp),
         "__longjmp" => func!(crate::jmp::__longjmp),
-        "_longjmp" => func!(crate::jmp::__longjmp),
+        "_longjmp" => func!(crate::jmp::_longjmp),
+        "_emscripten_longjmp" => func!(crate::jmp::_longjmp),
 
         // Bitwise
         "_llvm_bswap_i64" => func!(crate::bitwise::_llvm_bswap_i64),