diff --git a/README.md b/README.md
index 5caf43b..443fc34 100644
--- a/README.md
+++ b/README.md
@@ -38,6 +38,8 @@ The actual emissions are caused by the `_mm_stream_si128` instruction that write
 
 > Guri, M., Kachlon, A., Hasson, O., Kedma, G., Mirsky, Y. and Elovici, Y., 2015. GSMem: data exfiltration from air-gapped computers over GSM frequencies. In 24th USENIX Security Symposium (USENIX Security 15) (pp. 849-864).
 
+Please note that replacing `_mm_stream_si128` with a simple `x++;` will work too. My experience has been that  `_mm_stream_si128` produces a stronger signal. There may be other ideas that work even better, and it would be nice to improve this to be more portable (not require SSE extensions).
+
 The program uses square wave modulation, which is depicted below:
 
 ```