diff --git a/src/common.h b/src/common.h
index 8399e54..4b7dc98 100644
--- a/src/common.h
+++ b/src/common.h
@@ -49,7 +49,7 @@ static inline uint64_t XorShift(uint64_t x) {
 
 [[noreturn]]
 static inline void Abort(const std::wstring& msg) {
-  MessageBox(NULL, msg.c_str(), L"PROGRAM ABORTED", MB_OK);
+  MessageBox(NULL, msg.c_str(), L"PROGRAM ABORTED", MB_ICONWARNING);
   std::exit(1);
 }
 [[noreturn]]