diff --git a/makefile.vc b/makefile.vc
index e5161c638..3c64c4b99 100644
--- a/makefile.vc
+++ b/makefile.vc
@@ -236,7 +236,7 @@ else
 endif
 
 else
-	CFLAGS	 = /nologo /w /O2 /Ox /Oi /Ot /Oy /Ob2 /GF /Gs /Gy /GL /Zc:forScope /MT /EHsc
+	CFLAGS	 = /nologo /w /Oi /Ot /Oy /Ob2 /GF /Gs /Gy /GL /Zc:forScope /MT /EHsc
 	LDFLAGS += /LTCG:STATUS
 endif
 
diff --git a/whatsnew.html b/whatsnew.html
index 1503f9b0b..e992ef578 100644
--- a/whatsnew.html
+++ b/whatsnew.html
@@ -112,6 +112,7 @@
 <li>Fixed bad static/clipping noise on several Neo-Geo games (Art of Fighting, Football Frenzy, etc) with FM Interpolation [dink]</li>
 <li>Fixed unclear/staticy sample/instruments in all games on Irem m72 hardware [dink]</li>
 <li>Fixed sound in Renegade, replacing custom ADPCM with MSM5205 [barry, Alex Jackson]</li>
+<li>Reduced MSVC compiler optimisation level (fixes Tetris Plus 2 and maybe others) [barry]</li>
 </ul>