diff --git a/src/libm/dispatcher.h b/src/libm/dispatcher.h
index f9de604..ccbc786 100644
--- a/src/libm/dispatcher.h
+++ b/src/libm/dispatcher.h
@@ -27,6 +27,14 @@ static int cpuSupportsExt(void (*tryExt)()) {
   static int cache = -1;
   if (cache != -1) return cache;
 
+#ifdef _MSC_VER
+  __try {
+    (*tryExt)();
+    cache = 1;
+  } __except(1) {
+    cache = 0;
+  }
+#else
   void (*org);
   org = signal(SIGILL, sighandler);
 
@@ -38,6 +46,7 @@ static int cpuSupportsExt(void (*tryExt)()) {
   }
 
   signal(SIGILL, org);
+#endif
   return cache;
 }