diff --git a/utils/not/not.cpp b/utils/not/not.cpp
index 546f989d7fa..af942500186 100644
--- a/utils/not/not.cpp
+++ b/utils/not/not.cpp
@@ -32,6 +32,13 @@ int main(int argc, const char **argv) {
   std::string ErrMsg;
   int Result = sys::ExecuteAndWait(Program, argv, nullptr, nullptr, 0, 0,
                                    &ErrMsg);
+#ifdef _WIN32
+  // Handle abort() in msvcrt -- It has exit code as 3.
+  // abort(), aka unreachable, may be handled as crash.
+  // FIXME: Could we move this into Win32/Program.inc?
+  if (Result == 3)
+    Result = -3;
+#endif
   if (Result < 0) {
     errs() << "Error: " << ErrMsg << "\n";
     if (ExpectCrash)