2 files changed, 13 insertions, 8 deletions
diff --git a/src/postamble.js b/src/postamble.js
index fb552606..066b83e3 100644
--- a/src/postamble.js
+++ b/src/postamble.js
@@ -37,14 +37,9 @@ function run(args) {
 
   __globalConstructor__();
 
-  _main(argc, argv);
-
-  while( __ATEXIT__.length > 0) {
-    var func = __ATEXIT__.pop();
-    if (typeof func === 'number') {
-      func = FUNCTION_TABLE[func];
-    }
-    func();
+  if (Module['_main']) {
+    _main(argc, argv);
+    __shutdownRuntime__();
   }
 }
 
diff --git a/src/preamble.js b/src/preamble.js
index 07ddf7ea..8a42243a 100644
--- a/src/preamble.js
+++ b/src/preamble.js
@@ -168,6 +168,16 @@ function __initializeRuntime__() {
   STATICTOP = alignMemoryPage(STACK_MAX);
 }
 
+function __shutdownRuntime__() {
+  while( __ATEXIT__.length > 0) {
+    var func = __ATEXIT__.pop();
+    if (typeof func === 'number') {
+      func = FUNCTION_TABLE[func];
+    }
+    func();
+  }
+}
+
 // stdio.h
 
 // C-style: we work on ints on the HEAP.