diff --git a/src/main.c b/src/main.c
index a3f3725..4356b14 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,18 +1,28 @@
 #include "debug.h"
 #include "vm.h"
+#ifdef __EMSCRIPTEN__
+#include <emscripten.h>
+#endif
 
 /* #define MEMORY_SIZE 65536 /\* 64KB memory (adjustable) *\/ */
 #define MEMORY_SIZE 1024
 
-void run_vm(Data *memory, uint32_t memory_size) {
-  uint32_t pc = 1; /* Program counter */
-  while (pc) {
-    pc = step_vm(memory, memory_size, pc);
+Data memory[MEMORY_SIZE] = {0}; /* Memory array */
+uint32_t pc = 1;                /* Program counter */
+
+void mainloop() {
+  pc = step_vm(memory, MEMORY_SIZE, pc);
+  if (pc == 0) {
+#ifdef __EMSCRIPTEN__
+    emscripten_cancel_main_loop(); /* this should "kill" the app. */
+#else
+    core_dump(memory, MEMORY_SIZE);
+    exit(0);
+#endif
   }
 }
 
 int main() {
-  Data memory[MEMORY_SIZE] = {0}; /* Memory array */
 
   int i = 1;
   memory[0].c[0] = 'z';
@@ -61,7 +71,11 @@ int main() {
   memory[102].f = 5.f;
   memory[103].f = 5.f;
 
-  run_vm(memory, MEMORY_SIZE);
-
-  return core_dump(memory, MEMORY_SIZE);
+#ifdef __EMSCRIPTEN__
+  emscripten_set_main_loop(mainloop, 0, 1);
+#else
+  while (1) {
+    mainloop();
+  }
+#endif
 }